Things I liked: Once the initial charge is put on your air tank, refills are fairly easy. It is cheaper, quicker and lighter than carting around an electric pump or scuba tank. It is also much more convenient than going to a scuba shop for refills, as your shots drop consistently and quickly after only a couple of pellets. You can just top off to 3000psi after every 5-10 shots all day.
Things I would have changed: 1) The baseplate can and did rip off if you pump at an angle or aren't careful. I would like to see a much more sturdy baseplate attachment. 2) If your don't end your pumping session with the pump vigorously pushed down all the way to the stop, you will leave a light charge of compressed air inside the pump which can and did ruin the internal gaskets. I would like to see some way to bleed all the air out of the pump, not just the final stage bleed screw.
What others should know: Keeping the airgun's tank pressure consistent, what ever pressure you shoot at, is very important if you want to have clover leaf shot groups at 25 yards, which Airforce rifles will do.
Things I liked: These are inexpensive, accurate and there are plenty of pellets in the tin for a full day of plinking with a couple of kids.
Things I would have changed: Everyone prefers a screw on, or snap on lid.
What others should know: Great little pellet whether you are shooting with 3 pumps or 10 pumps. IMO these are the pellet you should start with as a baseline when you test what works best in your air rifle. Worst case you'll have fun.