I rented one just for kicks one time. I didn't like the grip, and ammo is flippin' expensive, but there was pretty much no recoil.
Not worth buying, IMO. I'd go with one of these first: http://www.kel-tec-cnc.com/pmr30.htm
. A pistol loading of .22 mag, CCI makes one I believe, will give you comparable performance to the 5.7x28mm, at half the cost.