Things I liked: Everything! They shoot the most consistent groups compared to other top ammo in my Air Arms TX 200 MK3, I just love them, I just order 12 tins from Pyramyd Air.
Things I would have changed: As most everyone says, a screw on lid.
What others should know: I've tried only a handful of pellets through my rifle, but I always come back to these. Groups immediately shrink when these are being shot. Weight @ 8.4 gn seems to be just right for .177. All pellets should have this shape. I've tried only a handful of pellets through my rifle, but I stay with these, this is what my tx200 likes.