I recently purchased one in .177 and sent it back. I'm a pretty big guy, 6' / 240lbs and the cocking effort was massive. It stole all the fun out of shooting. Many crossbows require less effort! It also recoils more than a .22lr and sounded almost as loud. Ad in it's massive size/weight and its just about pointless.
Quality wise, it was very nice though. Accuracy was fine with cheap pellets and iron sights. I could cover my groups with my hand at 50y.
As always, this is my experience and your mileage may vary.