i was curious so i got one in 25 to see how it behaves before i went 30. so far into it for about 65 shots and it is impressing me so far. I have never had a gas spring befor so i cant compare to any others. i can say that the cocking stroke smoothed out after 10 shots, and is as hard as they say it will be. I am workimg on a technique for cocking and shooting i have been shooting my favorite brand jsbs in it this time kings. shot cycle is super quick and it doesnt seem very hold sensitive. i shot about 25 shots open sights and then mounted a utg 4x on it. if you have any ?s ask other wise just hang out and ill keep you posted...thanks