I went to iCombat for the first time yesterday and I felt that I needed to set the record straight. It was a blast! The staff was very helpful and I went with a group so I would definitely recommend going with a group, but I'm sure it would be fine to go alone too. There are definitely a few die hards that were there, but probably only a half dozen or so out of 40 people. They do not ruin the game because there are tons of people with your same skill level, whatever that may be.
The only real complaint I had was that the equipment was soaking wet with sweat when I put it on. They should at least like wipe them down between matches or something. All in all a great experience, and we got a groupon for $16 per person so that's even better!