Hydor has a 2 year no questions asked warranty which is pretty good and their customer service is top notch. They had some problems early on but the new 850, 1150 and 1500 are suppsoed to have solved those issues. I had over 2.6 MILLION starts and stops at 30 second intervals on the last pair of 1400's in a little over 2 years use and only replaced them because there was normal wear on the impeller blades which I felt cut flows a little. I can buy a lot of Evo's and the RKL controller for what one of the others costs. The MP is a good idea but still needs a little perfecting in my own opinion and Tunze needs to look at adjusting pricing to stay competitive now that there are more alternatives on the market, once they pretty much had things locked up but now they are a bit proud of themselves. Again only opinion.