I bought the BSA Ultra SE, 2.2 in May this year. I'm using the multishot mag at the moment, an finding easier than fumbling around for pellets to reload! I had a perfect 60yard headshot on a rabbit, which amazed me considering the size of the gun. I only had 100lb of pressure left in it too!!!
Absolute pearl of a gun I think... and the only advice I can think of giving, is go buy as many multishot mags as you can afford, fill them up and go catch them bunnies!