My Aquabot Tempo died a few months ago and I have been waiting to purchase a replacement until now. I'm thinking about a Pentair Prowler 820 but would want to hear from some users before taking the plunge. I'm a new member so any input would be appreciated. I was fairly happy with the Tempo but it was higher maintenance than I hoped for. I did have to send it in once for a reversing failure all the way to New Jersey. Otherwise, it was regular changing of tracks, belts and wheels along with scooping out the sealant putty from the electrical connections between the cord and the motors. This was a tip I got from another forum and probably prevented further catastrophic failures until recently.