Speaking as someone who owns one and shoots one, I can tell you that the gun is very accurate, sweet handling (light with little recoil, but not boring) and that ammo can be had close to $21 a box of 50, and seems to be about the only ammo that you see anywhere these days with any regularity.
Plenty of folks have opinions about this gun, but I'd listen first and foremost to the pros and cons from those who have actually shot one. Picking up a gun in a shop or passing along the same old stuff read in forums is a poor alternative to opinions offered by folks with actual hands-on experience, be it positive or negative. This is an unusual gun and you owe it to yourself to get opinions from people who actually know what they are talking about based on actual experience. Observations like "I picked one up once and it seemed like a toy" are fairly worthless. Also, as this is a major expenditure (it was for me, at least) I would strongly recommend shooting one first, if possible.
There are plenty of Cliff Clavins out there, but you need opinions from those who know firsthand.