My mom purchased one for herself about a decade ago. She kept bugging me to buy one and finally bought one for me herself and gave it to me as a gift. This is AMAZING!! There is no invention better for personal comfort. My mom moved, and I promptly bought her a new one. We both are just so thrilled with this item. On a side note, when we travel, the portable one sure does help!! Not the same of course, but so much better than not having anything. Please do not delay, you will not be disapointed!