Quiet, accurate, good price & nice clean look. Have yet to have a ball bust with the Winforce/Shutter combo. Have shot maybe 6,000 rounds so far. I used it on a Spyder Sport for awhile, and it work as good as it could with that gun. Breakage of balls was still at a minimum.
Nothing as of yet. When I upgrade to compressed air, I hope it works even better.
Cheap barrell that works great with my Shutter...
I give it a 10 with the stock Shutter, with give it an overall 9 since I haven't shot with compressed air yet.