My close friend has one, and lets me borrow it all the time. It's a nice rifle to have, and someday I plan on buying one (if ever I become less poor).
A_S is right about everything regarding them... They are really nice & accurate IF you mount a good scope to it. They seem to work wonderfully if you have a Tasco red-dot, or a laser mounted to barrel, or some other red-dot scope mounted... They are considerably accurate at 100 yds! I don't know about outshooting an AR15, if you have it on sand bags, possibly, but who uses sandbags of bipods on a bullpup?
It works great with Thermold 30rd magazines, but getting fast at reloading takes practice, because ergonomics of mag release isn't bad, just different... There are 2 hand positions for mag releasing... They're nice guns overall though.
If you already have an AR15, buy one of these or try one out... They're fun. Sometimes if shooting rapid-fire there is a TON of smoke from the ejection port that comes up into your face. Thus irritating your eyes & nose, but safety glasses help prevent this, and breathing it isn't bad if you winclean ammo.
-iNuhBaDNayburhood