It's hard to tell whether I should recommend this game or not, cause it's really fun to play at first, then it gets a bit repetitive after awhile and later when you start (if you start at all) grinding tiers - it becomes total cancer.
There's not much of a story either, you just take out cartel bosses one after another completing same missions, to get to main cartel boss - El Sueno.

Pros:

- Like most of other Ubisoft's games this looks outstanding graphically. Seriously, at some moments you just stop and look at the that beautiful landscape - it's breathtaking, great foliage, clouds, building's textures, character and NPCs details are amazing.
- Day/night and weather cycle is one of the best I've seen in a PC game. And NPCs adapting to it too. During night enemies usually sleeping at their camps, excluding some patrolling guards, your squad is more difficult to spot.
- Sound is good, nice voice acting, great weapons sounds.
- Lots of different weapons to try out, plenty of attachments and throwable items. Assault rifles, SMGs, LMGs, sniper rifles, shotguns, grenades, C4, mines, flashbangs etc.
- Co-op is amazing, very fun to play with friends. I had great time attacking enemy bases and completing missions in co-op.
- Gameplay is okay but it could be better. Using strategy and planning your assault is really good in Wildlands. Using drone to spot enemies and sniping them from distance is my favourite part of this game.
- AI is okay, you can't run into enemy like some Rambo guy, you will instantly get shot and knocked out. When enemies spot you, they will try to get to you from different angles, they'll use environment to cover, throw grenades to flush you out.
- Skill tree is okay, although it takes long time to max out every skill.

Cons:

- Physics are pretty bad in this game. For instance, when helicopters gets shot in the air by RPG or any other rocket, most of the times it won't explode when hitting the ground, instead it'll fall down as some random piece of metal and only explode after awhile (even though it's full of fuel), it's very unrealistic. Also, you can't even jump, I lost the count how many type I got stuck under or between rocks when approaching enemy camp and I had to restart from last checkpoint because I couldn't jump out of it, simply because there's no option to jump, only to climb up on obstacles when game promts you command for that.
- Driving is hell in Wildlands. No matter where you drive - asphalt or off-road, it feels like you're driving on some plastic surface. Most vehicles seems very unstable and jumpy on any type of road, it's very easy to crash even at lower speed, that's very annoying.
- Friendly AI is garbage. When your character gets down, it takes forever until your AI teammates gets you up, even out of combat, they're moving trajectory is super dumb when sneaking into enemy camps, they constantly get spotted, and sync shot is very badly and unrealistically designed. No matter whether they can see enemies or not, they can snipe them through walls with sync shot, but apparently in close combat they can't even kill enemies that are 10 feet away from them.
- Bullet spongy enemies. When you stealth killing enemies, there no problem at all, most of the time you can one shot them with simple pistol in torso. But after they spot you, it takes 3-5 shots, sometimes 8-10 shots if enemy got armor, even with assault rifle. On the other hand, enemies (on higher difficulty) can put you down with 1-2 shots easy. That ruins realism for me.
- Grind, grind and even more grind. You got 30 levels, lots of skill points and resources to gather. Skill points are easy to get, just get intel, travel to camp and get it or just level up. But after you get to level 30 you will be able to unlock tier system, you will be able to grind from tier 50 to tier 1, you will also get prestige credits to be able to buy prestige crates and unlock some random (mostly useless) stuff in-game. It's okay until around tier 33. After that, this game becomes cancer. I like challenging games, but in Wildlands "hard" won't be concept anymore, it will become your only reality in this game. As soon as enemies will spot you, enemies start flying and driving in from random locations, they will literally just spawn one squad after another, until you get out of that enemy base or camp. You will also need to get resources because with every tier enemies will become stronger so you have to upgrade your weapon's damage and you're gonna have to grind a lot, doing same thing over and over again. And this is already became a trend in gaming, especially in Ubisoft's games. And this is total bullsh**t if you ask me.
- Microtransactions. Like in most new games you can become god in the very beginning of the game. Just buy resources, skill points, weapons, weapon's attachments, vehicles etc with real world money and you're good to go :)
Ubisoft's doing great job again - milking hell out of this game with MTX.
- Some glitches and bugs like I mentioned before - stuck between/under rocks, some random death when falling undermap because of glitch, not being able to attach suppressors on weapons etc.

I'm doing my second playthrough solo right now and still enjoying it most of the time. I just think Ubisoft should make all in-game stuff available for all, just by playing game, without this stupid microtransactions nonsense. All weapons, all vehicles, everything should unlockable by playing or be given as rewards. But no, it's to difficult for Ubisoft. They have to lock most of in game items under paywall - some items can only be acquired by buying spec ops or ghost war crates. Of course you can grind for hours for some items but is it worth it? Once, I had to grind for 8 hours straight just to get 2 items, yeah that was really fun...

Right now I'm just trying to not pay too much attention to it, I'm playing with Tier system disabled. Still, this product is one of few newer games that actually gave me lots of fun and entertaining moments, and actually made me play it more than once, so I think I have to give this game thumbs up. Just bear in mind that this is not typical old school Ghost Recon game, this product only got GR tag on it, but it's nothing like classical GR 1.
However, map is huge, looks great and I think it's worth trying if you like stealthy games, especially if you got friends to play in co-op, because co-op is great in Wildlands.

6/10