Can't say which is the best, (How can you unless you've had 'em all!) But have had 3 Truma (1st. one was a Carver before Truma took them over) and I shall no doubt have a fourth. Never had a problem, only changed when old ones were superseded by newer improved models. Some of them, can't remember how many, were refitted when we changed vans. Been running them since the early days when movers first came on the market, so had them for a good number of years