Used one for a few years now. They work great. Just be aware that if it isn't too cold out you will be sleeping on top of your sleeping bag. Lol. This one needs no power or glow plugs. So much better than a wood stove in a wall tent IMO.
This is the one I use: https://www.deluxewalltents.com/diesel-heaters/
starvin, DM me if you have any questions.
What size heater are you using in what size tent?