I've been having a blast, beating this game today in two 3+ hour sessions and I had zero problems with motion sickness or the camcorder style camera. It doesn't require "stomachs of iron" or anything to play this game, the reviewer from ign is just an idiot.
The camera is actually making this a very intense "you're there" experience. And while it may ruin some shots every once in a while, you're usually not required to shoot right then anyway.
The often critisized boss battles are just fine as well. Bosses sometimes are not taking hits while transmogrifying or while being busy with certain animations, but you're always seeing wether its taking damage on their energy bar. If they're not, don't waste your ammo on them, simple as that...
"Professional" reviewers, eh?
Anyway, fun popcorn stuff. If you haven't already played Umbrella Chronicles to death, give it a try. It's even better than that, with significantly improved production values. A fine 8/10 in my book