I have a pre-ban...
16" Sporter with pencil-barrel. It's a nice rifle; accurate enough (i.e. more accurate than me even with a low power scope on it). Reliable enough so long as you use quality magazines. Don't buy crap magazines, ITS NOT WORTH IT!
I have a telescoping stock on mine and use 30rnd mags, recoil is present and a little more noticeable than on the 20" versions with the full stock and the heavy barrel, but its certainly not heavy recoil. I was able to trigger off 30 rounds in about 12-15 seconds while keeping the vast majority in a man-sized region at 100yrds.
The advantage is handyness and ease of carry. You probably wouldnt win championships with it, but for a SHTF urban weapon light enough to haul around with you it certainly seems nice to me!
JT