the last heating pad i had had broken late in the evening, so i didn't have time to go shopping at several places for one. my local 24 hour store only had 2 pads in stock, this one & the one that had just broken. knowing that the other was no good, i bought this one, even though it is half the size of the other. it did heat quickly, but it never got hot, only warm. it was also way too small for my needs. the option to keep the pad on longer than 2 hours was nice though, as i use one for the majority of the day.