We have one of these that we installed two years ago and it’s been running so great.   No tub leaks.  Pretty much running 24 seven for two years.  it’s actually been installed at our home in Colorado Springs where it endures both summer and winter temperatures .   When we are home, we run it at 102°, and when we are away, we turn it down to 80.  But it is running 24 seven and has been on for two years straight.   We have solar power with batteries and have had no issues at all except for a small leak of the panel down to the inside.  I fix this with a little bit of silicon, but otherwise really fine.   I did the electrical with permits from the city.   it was a little tough to get the six gauge wire to the terminals but I inspected every year and the electronics looks good and the plumbing is spotless.  I put a wireless temperature monitor and leak detector and give me a good indication if there are any problems going on or if power is lost.   I would buy another one if needed.