Things I liked:Does what it's supposed to, and was able to get around 200 shots, first 100 being relatively consistent in my Umarex Makarov gun, with 380 fps rating. I haven't used a co2 air gun in quite a while and though I wouldn't say I can compare to other cartridges, I'd say these worked great for me. Things I would have changed:Non that I can think of. What others should know:I was going to get the Crosman Powerlet Co2 but Pyramid Air was out of stock, would be interesting to see how those perform compared to these once I run out. Also perhaps because my gun was brand new, the first few shots were a bit off, but after that full power and consistency was achieved. Not much else I could say, other than I am quite happy with getting 200+ shots off.