Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great at Stabilizing, but Leaks

Installation of these air springs is a good 2-3 hours depending on your skill level and the type of jack you're using. Installation for my Ford F-150 went pretty smoothly.I have had trouble keeping air in them. I'm having to inflate one side daily. The manual talks about where the leaks may occur, and they're right. I found it impossible to follow the directions literally and not have a significant air leak.The air leaks occur where the air fitting connects to the top of the unit. I tweaked and tweaked, and even put teflon tape on the threads ( which helped a lot), but I'm still having trouble with one of them.I'll looking at an RMA soon if I can't get this resolved. I don't understand how these folks can make this heavy-duy air spring, with steel hardware to fit your vehicle perfectly, then mess it up with a poorly engineered air fitting.- FB