I had one of these and got rid of it. Longer barrels CAN be fitted to improve aesthetics and velocity (accuracy?) but I don't know if the latter impacts legality. (even with the super-light BBs) They are surprisingly well-made, and I never had a single issue with mine. I'd say they're pop-can hunters, that's about it. They go off with more "oomph" and noise than you might expect them too, but a smooth barrel and crappy BBs can really spray your shots all over the place. Maybe a longer barrel improves this?
I had more fun (and accuracy) with it set on single-shot mode with a red dot sight. Even my kids could knock over pop-cans from 40' away or so. I think the CO2 freezes the barrel on the "auto" settings, things start to get screwy when you let 'r rip. There is allot written about these guns, and the mods for them, I kept mine totally stock. Fun toy, cool wall-hanger, but a pest gun...I don't know.
I DID end-up getting a hard-hitting, QB79 rifle that is now my favorite air gun. Easily modified, and damn accurate too. Consistent shot-to-shot power with a big 9oz. CO2 bottle hanging on the nose. I's strongly suggest one of them over a Drozd. D&L in BC sells the QBs.
http://www.dlairgun.com/Industry.html
Not the "tacticool" (a word I hate) factor of the Drozd, but even with a half-decent scope, comes in well-under the cost of one. My own, set-up with a 9X scope and Harris knock-off bipod.