Review (4/5): Good Product. Great Customer Service.
UPDATE (05/08/17):
After leaving my initial review, I was surprisingly contacted by the seller who offered to provide me with either a refund or a replacement cap. I wanted to find out whether the first heat cap I received may have been defective so I opted to receive replacement unit. When I received the replacement, the first thing I noticed is that it is a different (seemingly updated) model matching what is now listed here. Compared to the original unit I received, this newer version definitely has improvements. The replacement cap fits much better than the original which greatly reduces the amount of heat that escapes. It also seems that this cap produces a better amount of heat than the original one I received a few months ago. The biggest improvement over the first cap I received is that this heat cap has a built-in timer which automatically shuts off after 15, 30, or 60 minutes of use.
I'm satisfied with the replacement cap I received. Kudos to the seller (Nilmee) for going above and beyond to make sure that this customer walked away happy with his purchase.
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I'm torn on this heat cap, when it comes down to it, it's just okay. I've been using it here and there over the past few months and I'm just not impressed. The heating on the cap is inconsistent -- some areas get warm while others have barely noticeable heating. My biggest gripe with the cap is that it seems to be sized either for people with large heads or with an overabundance of hair. I have a shorter hair style and I either have to pull on the chin strap or lay down while using the cap, otherwise what little heat the cap emits just escapes through gaps.
If you have short hair or have a smaller cranium, you may want to explore other options.