To everyone considering on getting this mod:

Yes, it does work, but SkyUI is strongly recommended (download from skyrim nexus, workshop version not confirmed as of yet to work for this) as it will give you direct control of the mod without using the book, and streamlines troubleshooting if something goes wrong. You can also get SKSE here on steam. It acts as a launcher on its own and sets itself up nicely.

http://store.steampowered.com/app/365720/Skyrim_Script_Extender_SKSE/

Second, if you are using any first person related mods with this, they will conflict, but not fatally. You'll just get perspective related errors (perspective will spin 360 in first person). To fix this, initiate a duel in third person or keep first person duel enabled in your mod settings.

Third, depending on what diffuculty you are playing on, you will be curbstomped early in the game if you actively try to use this system. Get some destruction skill numbers under your belt first before trying to get yourself in a duel.

Finally, if you are having trouble initiating a duel, you just need to fire a stream related spell straight at your opponent (chest, head or their hand they are using to use magic) around the same time your opponent does. Make sure to hold the stream for at least a second. If its still not initiating, you can increase your chances of a duel happening via your mod configuration tab in the esc menu if you have SkyUI, or via the Magic duel reborn book that is given to you the moment the mod is active.