Finally got to use my R4. Not cheap compared to other propane heaters, but very pleased with it. We have a toy hauler with a patio, and camping out on the Olympic peninsula on a chilly, gray, rainy day, with the rear awning out and sitting here on the patio, only the barcoal section running on low, I am so toasty warm. Far better than any other propane firepit I've ever used.