I bought one of these from a friend for £40, and have to admit it was an impulse buy.
I have the .177 Co2 Desert Eagle, but wanted something as a 'coup de grace' pistol whilst hunting. And I have to say, it fills that role perfectly. Yes, its heavy, but I'm a big lad so heavy guns suit me(My BSA Ultra MS looks like a kids toy when I carry it!).

Anyway, question I have about it is, is there a way to up its power? Just by a lb or two.