-with a new barrel it's quiet and more acurate
stock barrel is really the only thing, but that's the same with most guns
When I first took it out of the box it had a CO2 leak in the bottom line. (This part might not be useful to you) It was easy to fix, if you notice that one of the bolts or nuts or whatever slides out when you put the tank in and CO2 comes out where the bolt has slid out, all you have to do is when your screwing the CO2 in is hold that part back and the problem is solved. That was just a minor set back for me, but anyways if you turn the velocity up pretty high it goes pretty crazy. But you're really not supposed to have good accuracy then. Just get a new barrel, any kind will do. Anything is better than a stock barrel. And it may not seem like it comes with a barrel plug, but it does. The silver cone thing on the bottom fo the expansion chamber pulls off and can be used a barrel plug. The first time you do it it's kind of hard to take off. It's a comfortable gun easy to shoot, not much blow back. It also shoots fast and is pretty light. I also did some testing. I stood 100 feet from a tire took 10 shots with ZAP paint, yes zap and made it through each time. Got too lazy to do anything besides that.
If you're willing to put a little work into the gun it's great. After you upgrade it a little it's fine.