On the whole these are a great product however there are two things that led me to only give 3 stars rather than 5. First, they take a while to heat up. Do not plan to open these on the spot and find immediate heat relief. They take a good 20 to 30 mins to fully activate. Second thing I wasnt pleased with was that the first few packages in the box Never heated up the way they should have. They were “duds”, and I was going to return the whole box thinking they were all expired, however the next few packages worked much better and so far have been ok. I wished they heated up within seconds. Just know if you get these they requre some planning ahead, and bring extras in case you get a “dud” that doesnt heat up well.
