So far, I am extremely happy with this heater. It starts reliably and heats really well. I love that I could tap into my gas fuel tank just like the diesel heaters do. It runs much quieter than other heaters I have seen and especially the Chinese heater I replaced. The brushless bearing motors are great. Also, the fuel pump is pretty quiet as well. I have had no issues with it as opposed to the cheap Chinese heater. Another big advantage to this heater is the availability of parts that are made for this heater. The email support has been first rate and any additional components that I needed were sent to me free of charge. It is so great having an actual person that responds to my questions and or issues. I have not run it at high altitude yet, but as solid as this runs, I have no concerns that it will be an issue. I think that it is sold at a good price compared to the other main brand sellers, especially if you can get a discount. A few of things to note, it did not come with a muffler or an air intake filter thing. Both were sent to me immediately when pointed out. I also had an issue with the WIFI controller due to signal issues which only effected the use of the Smartlife app. They sent me the newer Bluetooth version the next day. The third thing regarding this particular heater, is that it has a fixed coolant temperature shut off. I think I can work around this easy enough though. I absolutely wish I would have known about and spent the extra money and gone with this heater to begin with. It would have saved me countless hours of frustration and some very frigid nights in the snow.
Again, awesome company to deal with and I would highly recommend them