We bought this unit to have a vacuum pump to milk our goats with after my wife broke her hand after dumping her Honda motorcycle. We use it twice a day, every day. Being all made of plastic, I does kind of worry me about it's ability to last, but I hope it lasts long enough to get my brakes done on my 68 Firebird. Would I buy it again? Probably not. I'd go to an all metal one just so it "feels" better. I am really careful when I start pumping this unit.
If that one guy (Been there done that), who complained about the threads leaking would have read the directions, he would have learned that Eastwood recomends using Teflon tape on the threads to avoid leakage. Kind of a pain in the a**, but if it works...
I don't know about the "pressure" part. I tried to get it to make preasure and couldn't figure it out. Of course, I am old so who knows! LOL!! Maybe these other guys figured out how to get it to pressurize by accident, and are hooking it up wrong, and the pressure just blows the unit apart. I have an air compressor for all the pressure I want. Anyway, not a good review, not a bad review.
Have a great day!