my 2 cents or 3?
I have only had one Stealth go bad on a service account. it just fell apart & quit working. We use to sell ViaAqua which was pretty good & still use some without problems then I had some customers start to complain & return them. So I started to push the Stealths because of the reviews early on & now reading this & I have had a couple customers stated they quit working? They are suppose to automatically shut off!
Ebo back in the day were the best heaters by far, then Eheim picked it up & for awhile people were having a lot of problems them going bad, I know because I tried them again & they failed. Maybe now they are better again?
But these damn company's need to get their Head out of their *** & make good heaters period since it is a major life support of our aquatic animals. I have been in business/hobby now for over 30 years & you would think they would get it right by now. These giant companies seem to always look for the cheapest way to make something then charge a arm & a leg for it. I could on & on about products we have had or tested. I typically try a lot of new stuff before selling it because if it sucks I'm not selling it if I would not use it.
The quality of some these products (Marineland/Perfecto) & others is getting pathetic. And any employee working at their factories etc.. that let something go out the door sub par should get a kick in the arse! I have as many others have a lot of $ investing in our aquarium hobby/business to deal with crappy products.
Do it right the first time or don't do at all!
okay i'm done for now.

me Dave