About a year and a half ago, me and a friend bought comparable jacks, I bought the craftsman, he bought the harbor freight... My craftsman (similar to the one posted above, but with the solid front roller), has been nothing but problems. Damn near every single time ive gone to use it, it has failed to lift, or required to be bled to get it to work.... I have returned it to sears for a new one, which also started doing the same thing on about its 5th or 6th lift....
Craftsman jacks, i will NEVER buy another one.... yes the machining and build quality is nicer.... but the parts that do the work suck asshole.
My buddies cheap harbor freight, was much cheaper than my craftsman, and as far as i know, never failed to lift. I recently got tired of the craftsman jacks game, and it has been sitting outside in my driveway ever since I bought the HF replacement for it.... which i am VERY HAPPY WITH...
This is one of maybe 5 tools from harbor freight that I like, I am in no way a harbor freight fan.... but their floor jacks are spot on!