I have one of these and a beeman p17 copy.The beeman is not bad at all,missing the truglow sights and the trigger is not quite as good and the quality of the parts is a little inferior.
I drilled a hole half way down the compression tube on the beeman and removed any burrs.It's ideal if you don't have a 10 metre firing range,the power is ample without losing accuracy and you can cock it with 2 fingers with hardly a sound on firing.Just put a little electricians tape over the hole to go back to full power.