The Vortek kit is wonderful in my .22 cal 350 mag. The stock setup was making some crunching sounds when it was cocked and there was a little twang and spring torque when fired. The kit put an end to that stuff. It cocks very smoothly now and the firing cycle is quieter with no aftershocks or anything. It still recoils a bit but that's one of the things that makes shooting a magnum springer fun. The kit is easy to install in the 350 as long as you have a decent compressor. I would not recommend using the lube provided with the Vortek kit though, I took mine apart after about a year and a half and found the lube had turned into a gritty particulate on the spring. I cleaned it off and applied my own lube to it, a mixture of Lucas oil's red and tacky #2 EP bearing grease that I blend with graphite powder. In my opinion, the Vortek kit is definitely worth the money.