I was never a fan of add-on hot-shoe thumb grips. But after handling another camera with it, I decided to purchase one for my GM5. In hindsight I could have just purchased a cheaper generic version. But I really like this COTTA version you can buy from Japan, and they will ship to USA. It's much more pricey than the generic version. (Do not buy Cotta off ebay. They are charging double) Handling is night and day. I can easily one hand the camera even with larger lenses with no problem. In fact, I started to use my larger lenses more often then my smaller set. I also added pics to this thread of the Gariz GM1 half case and the Sunwayfoto GM1 grip to show that they do indeed fit the GM5. 75, 25, hoods, GM5, Cotta thumb grip Hot-shoe thumb-grip Gariz half-case GM1 fits GM5 Sunwayfoto GM1 grip fits GM5 GM5 "handstand"