Unfortunately, there is (in this model) a big BUT ...
My first underbed this brand and model held no fewer than 2 months. The electrically heated beds have (what actually is super) protection, which switches off the bed in case of malfunction and / or overheating. But not only off but irretrievably inoperative. Uses this mechanism, the lower bed never go again. Fair enough, I thought I had probably a malfunction and was glad that the protection has saved me from worse. Bill I had not, stupid, but my mistake. Since I had bought two more beds for relaying the offer, I did keep myself, and used one of them. This then also held a total of six weeks. Crap, but one thing I still had and thought, a chance yet! The bed then held actually by the end of April until last night (though yes, including Somme time-out).
Three broken beds within not even quite one year can not and should not be normal (never washed in normal use in bed, turned on only occasionally). Now I have (because gifted) the slightly larger SWB 50 Sanitas in bed let's see how long does that. Otherwise there in the future for me probably a new brand. Too bad, I found the heater bed really super. Actually ...