Things I liked: The heft of the rifle - it sits in your hands with a definite solidity. High coolness quotient with comfortable handling and stability. For a single-shot, under lever, this is one excellent airgun.
Things I would have changed: Weight to the rear of the rifle. Yes, it's already heavy, but IMO, it would provide a more balanced feel. Nothing other than that.
What others should know: First, it's heavy, almost 10 lbs. No way around it. Solidly built, no wobble or rickety movement, but you need to be aware of that going in. Second, charging the gun requires decent strength. The leaver has a lot of tension and travel. Also, it's 'two-stage', meaning you have to pull an extra bit at the end after you've opened the breech to set the trigger. Overall, I'm hugely pleased with my purchase.
Things I liked: Full metal heft, blow back, full auto option. Esoteric bit of firearm history.
Things I would have changed: The price of additional magazines. Not that it's incredibly accurate on full auto but rear sight could be wider.
What others should know: Laughed out loud the first time I shot full auto. This little gun is a blast. Make sure you stock up on CO2 and BBs. For me, three mags per CO2 is par for the course. Fun plinker, conversation piece. Not for serious target shooting or varmint control. (unless you want to hose squirrels down) Own one for for the sheer fun of it.