Ive used it many times and it does work great, however i beleive the last time i used it some drifted onto my leather (in the middle of it) and sat there for awhile.. Since then there is a big hole for no reason whatso ever right in the center.. Could it be from the joe's juice yes, could it be from something else maybe? If you use it just make sure you turn your powerheads off just in case!