I’ve now purchased 2 king sized Sunbeams in as many months. It’s been 50 years since I had an electric blanket that gets hot. All have been lukewarm making you wonder if they are even on.  After a year or two, they’d quit working altogether (not Sunbeams). Time will tell. If after a year or two these begin to flash the dreaded error codes. I’ll be back with a scathing review. 

LOVE the preheat mode. 

PS: Yesterday I ordered two twin blankets for 
our guest room.