Pros:
* Great game, great replay-ability. Its actually made FOR VR unlike many other games that either pretend or have it as an afterthought.
* Second best VR game I own right after Boneworks!
* Doesnt give locomotion sickness as much as other games. My girlfriend usually cant play smooth movement games but this one doesnt make her feel sick because of the movement system.

Cons:
* Only 3 main bosses in the game so the campaign is very short. Wish it was closer to binding of isaac in terms of depth but again it has great replay-ability and you unlock arms, add-ons and other stuff between games.
* Does not work with default Valve index controls which becomes very obvious when a buzzsaw arm doesnt work on your right hand and on the left you need to squeeze so hard it might break the controller. I spent over an hour trying to get rebound controls to work restarting steam/index/underdogs 7 times and the control schemes were just completely ignored. I was using community made controls which is the only way to make most of the weapons actually work on the index otherwise you just lose, unable to use your weapons.
* I wish the crowd actually reacted to you when you throw your hands up before/after a round
* I wish it panned around your mech in a cooler way after a match and showed you moving around doing emotes in 3rd person or some kind of replay of a kill.
* Valve index lacks support for fingers so you cant flip off the crowd, which isnt that important but gives a better sense of game completion.
*Its very hack and slash with only punches and bashes with no block ability. Boss fights are very hard until you realise all you can and must do is use one arm to leap forward while the other punches and then drag yourself back with the leap arm. Keep poking until the boss dies. Wish it had a block mechanic for some enemies especially bosses so it becomes more of a fight and less a poke match.

This game is evil. Not like there's ghosts in it, it just wants to physically harm you. Warm up, take breaks, be really, REALLY aware of where your walls are while you're playing.

It's a damn good game, though.

Some of the most fun I've had playing a VR game. I'm usually not that into roguelikes but the visceral feeling and sense of weight in this game makes me want to come back to it again and again. It fully takes advantage of arm movement and locomotion, rather than relying on your joysticks to move around. If you like bashing and smashing things up, you'll love this game. Highly recommend to anyone looking for something to show off what VR is capable of.