I own one and quite like it except for 2 thingsL
1- TERRIBLE trigger pull. It's gotta be over 10 lbs and is the worst feeling trigger I've ever shot. I'm not particularly sensitive to triggers but if you shoot the FS2000 and a garden-variety AR back-to-back you'll be sorely disappointed in the FS2000.
2- I bought it realizing that it wasn't intended as a tack driver but it has what I consider very mediocre accuracy. I only shoot surplus but at 100yds it's at least 1MOA wider pattern than my AR (again back to back with my 16"AR frankenrifle). So from maybe 3-4MOA to 4-5MOA. A little disappointing there as well. Although some people have reported 1-2MOA with match ammo so who knows.
Certainly it handles well and is pretty ergonomic but I think it's overpriced for what it is. I bought it because I've always wanted a bullpup and I like the fact that FN actually brought this to market.
You'll need a scope (Eotech, aimpoint or similar) since the factory sights are really best for backup.
It's fun to shoot, not too bad to clean and people are very curious about it.