Wow this is getting really popular lately! I've seen a bunch of posts about it. BASICALLY its different for every bowler. For me, when I got rid of inserts, I got a cleaner, more consistent release. Revs didnt really change, at least not that I can tell. Comfort wise, grips are a little more comfortable, but once you get used to none, and the holes fit good, its ok. It hurts at first so you have to get used to it, dont base your opinion off one game. It takes a lot of getting used to. So all in all, try it and see. Thats the only way. Plus if you start without grips, and change your mind you can just drill the holes bigger and put in ineserts.
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....BRUNSWICK!
¡Viva la nación de Brunswick!
Nothing more to be said.
....DEATH BY CHEETOS!!!!