the people that sell them swear by them, because their getting $150 for them
seems like you spill oil all over trying to change it-i wasnt crazy over the design, i never liked reusing a filter, after cleaning theres always the possibility of dirt from cleaning getting in there -when i had my machine work done, he would'nt stand behind it if i did'nt buy one, so i switched shops-i use the $7 k & n's-lets face it-there would be millions of engines failing if standard filters did'nt work-on a new engine, i change filters after the first hour running(you would be suprised at lint and crap that comes out @ fire up, no matter how much you clean)
i have heard of people getting a little more oil press with system 1, and i guess people running them swear by them, but a poorly built engine is gonna fail no matter what filter you run