The online is incredibly good, which is to be expected from GGPO. 4 player games tend to lag/desync a bit, but as long as you are not playing across countries, it handles it well. 1v1 online is nearly perfect from my viewpoint.
Controller support is also good, I have tested 4 different controllers, all of which worked. Only a few required minimal key binding.
Gameplay itself is of the "simple to pick up, hard to master" variety. Great for local party/competitive play. Its fast paced, and has a lot of "epic moments" for all your friends to hype about.
Not much content to be honest, though the game is obviously about multiplayer, and they do have a few modifiers to change things up. But this is an important note, if you don't have good internet/local friends, do not get this game. Though I doubt anyone reading this falls under this category.
I personally like the art style, I have heard a lot of people complain about graphics. I don't really need to review this though, if it looks ugly in the screenshots, you will find it ugly in game.
Boss soundtrack, as in GOOD electronic music, not try hard dubstep.
If my review seems badly written, it is because I am not a writer. But you can trust me on this, Lethal League is amazing for what it is, and is definitly worth the asking price. Anyone who is shying away because it is "too simple", there is a lot of depth/mind games to be had in hitting a ball back and forth(as silly as that sounds). Is it another Nidhogg? No. Another Divekick? ehhh, maybe, depends on whether you hated Divekick for its gameplay or for other reasons. To me, this seems like a similar concept to Divekick, though better polished, different gameplay mechanic that is more hype because of its faster/more deep nature, and a better presentation. This game is definitly better than Divekick, but still holds the similar concept of simple but hard to master.
In the end, yes, I do recommend this game. This game will entertain you and your friends for a long time.
If I have not answered your questions/concerns about this game, leave a comment and I will edit the review.
"I am terrible at this game.
10/10 Would noob rage again."