I'm quite satisfied...
When I purchased my Akimoto about 2 years ago, it was one of the best air intake systems for the G2 Legend at the time. I've never had a problem with it and compared to others, I'd say its close to stock at lower RPMs but you can hear an agressive (yet not too loud) rumble/growl at higher RMPs. You can't really get away from the noise produced from any aftermarket intake so it's something we all have to live with.
It's a very good intake so if you can get your hands on one, you'll really enjoy it.