Wave makers???

None of my Koralias have failed the oldest being 4 years old.I use them on the Hydor WM in my display tank. IMO when maintained properly they last and are a good deal for the money.(especially since I purchased most when Big Al had his crazy sale lol) I currently own11 Koralias. I haven't had any problems with them running in reverse on the wm except when a cover cracks(they usually last about a year and Hydor will send you a box full for free.) They have beefed up the plastic on the covers and have not had one fail yet in 3 months.
The ones on my frag tank can sometimes start in reverse which I think is weird because they are not on a wm. Never been a huge deal as all I do is usually unplug it for a sec and it starts up.
I haven't used the Jebao but people seem to like them.I may try one in the future after the Guinea Pigs have had them a while.lol sorry guys no offense.;D