Its a SIG so it'll run. It's like buying a Nissan instead of a Toyota, not a lot of add-on goodies for it, but if you aren't looking for all that it doesn't matter.
The one I fired seemed to have a decent but not great trigger, that would be the one thing that gives an AR an edge, IMO. You can just buy and drop in triggers in an AR now that run from good to absolute killer (AR Gold)