I've owned this RIS hand guard for about a year now and I'm still pretty satisfied with it. There's little evidence of wear despite heavy use and all the markings are still the same as they were when I received it. The main downside is that when I installed it I slashed my hand open on the rails -which resulted in the 'blood camo' pattern on it till at some point rain washed it off (I was a bit sad when that happened...) - and also at some point I slashed open my other hand when I fell hard while holding my rifle. So... I'd recommend buying some rail covers or just wearing gloves. Additionally, I'd be cautious about buying this if you have a triangle-type end cap (the piece right before your front sight) because mine wasn't a perfect fit and it made the RIS a tiny bit crooked...
rails can be removed
I've never had problems with installing things onto it (i.e. lights, lasers, blah blah...)
sharp... if someone isn't calling their hits......
Sharp, but that's a general problem with RIS
Didn't seem to fit the triangle-style cap on my G&G M16