I've got the new kinetic t-6500 and yes there's something off with the rouvy interface. It works flawless resistance wise with its native software and works well on zwift. I've rode a bunch of courses on rouvy, a couple actually felt good, some were questionable but hard to say due to their nature of difficulty, some were just God aweful. The worst ones literally go from 30kph to a brick wall poor transition, 30 watt jumps where I'm putting out steady effort, but the worst is I know what output I can sustain. I've done an ftp test, and with rouvy I'm only able to sustain a much lower output. For me it's reading about 30-50 watts lower, and in race mode there's no way to compensate. Not sure if this is my particular trainer or not, the only way to really be sure is to use an independent power meter. Personally I do have a hunch that it's trainer specific though. It's discouraging looking at the numbers, it's also a bit dangerous because one will try to push harder than they should. It's incredibly frustrating because this has the potential to be a great tool, however neither rouvy or kinetic is making a formal statement on it. If anyone else is having discrepancies I encourage you to please write them and explain your findings as well.