I played with this hopper a couple of weeks ago, I bought it as a backup to my halo. I read the reviews on here and thought why not. I was impressed by the profile and the weight of the hopper it is almost like it isn't on your marker. I had my gun set to ramp at 25 balls per second and the hopper was feeding like a champ, no miss fires of any kind. I did run into a problem with broken paint in the hopper and I was impressed that I was able to clean it out (mostly) with a swab and papaer towel. There isn't much to the inside of the hopper. All in all I would say it is a good hopper for a spyder that is. But I think it stands up nicely to my stock halo, both can do the job. Lets be honest who cares about shooting 35 bps when tourny's and most fields will have you capped at 15-17 bps. So the Hopper is a good buy if your on a budget or looking for something that holds more paint.