Recent reviews by Akuma Nightingale

Overall extremely enjoyable. If you love draft formats this one gives you an infinite draft format in the form of casual phantom draft. Physical TCG monetization in an online card game means you should weigh that cost first and foremost before spending the initial $20. Market prices seem to be mostly reasonable with the exception of Drow Ranger and Axe but their prices should stabilize and decrease as well over the coming month. The ladder, (non casual where you can earn rewards) phantom draft, and keeper draft all require event tickets. You shouldn't have too many issues getting enough tickets to milk as much out of the system as possible if you know what you're doing.
Gameplay wise it's about all I hoped for and more, but again understand that just like any card game you'll have to spend money to get what you want in any reasonable amount of time. Overall the amount of money you would spend on almost any other digital card game would cost more than just buying the cards you want on this market, but you won't have the option to grind outside of using tickets. Overall though the draft format seems to be more popular than constructed, so you should have no problem finding matches in draft mode if that's all you care about.