Don't know about hammer 7s not lasting
They are new enough for people not to have had long experience with them so if someone says they don't last then get them to explain - have they broken it or decided they don't like it?
The hammer gives a few options, pump with hopper or magazine feed, and if you want then the option of using first strike. For the price its a bargain. If it turns out not to be for you or you want to move on then its sellable