For just $150 or less, they do look interesting for sure. I investigated them a year ago and if my heat pump fails, I was thinking of installing one as a quick and inexpensive way to bypass a broken heat pump. Most of the 'reviews' I read were positive.
Haven't done that yet to my rig as the heatpump is still working fine, but if you install one in your RV, please come back and let us know what you think, maybe write an entire article with pics. That would be cool.
Diesel heater kit...
: 
Linear Mode
