These things are great. If I get some sort of dry bud product, the first thing I do is put it into a regular mason jar with a hygrometer and a Boveda for a few hours until the proper RH is restored. Then, after discarding the Boveda, I transfer it into one of these beauties to maintain it. These seem to be working excellent, too.
Keep my herb from drying out as advertised and easy to recharge. No complaints
Honestly........
I'd pay 20 bucks for one pod. The amount of money I save buying "old" flower. Makes this product beyond worth it.