Things I liked:Pump worked fine for about 25 fills on my Sam Yang and then stopped working. Air will not move to next chamber on the upstroke so handle pushes back to down position and does not pump air. Things I would have changed:Quality control???? What others should know:I only weigh 165 lbs., so the last 1000psi requires dropping all my weight on the handle. Be sure to bend at the knees to do this.
Things I liked:These .25 pellets group 1/4" at 17 yds out of my Talon SS on full power, starting pressure 2900 psi, and are running at 702 fps with 30 FPE. They match the accuracy of JSB Exs & Pred Polys out of this gun. Things I would have changed:Nothing What others should know:Every gun is different, can't tell until you try them in yours.