Product review (5 stars): Works great and holds lots of reeds : Good for doublers
I find my reeds both last longer and are more quickly ready for use when stored in this case.  A very nice combination!  Also holding 10 reeds is great for doublers.  I frequently play tenor, alto saxes and clarinet so this is a great advantage.

One warning: It's easy to think you've closed the unit when you haven't.  The reeds have to be inserted fully for the case to close properly.  If the lid isn't fully closed then air gets in and you defeat the purpose of this case.  The other caveat is that you can buy the humidifier packs for quite a bit less from suppliers other than Rico (now D'Addario).