I am loving the Indulgence 5V PT and 6V options. It also has all the adapters to use any atty including the 40x series.
I would like to get a GG+AFS and try the Juice Box.
It was interesting to read Youtubecomercial's opinion that "they are all different and special in different ways"....
To me they are all just battery housings with the only differences being:
1)different battery size/configuration options
2)different atty compatibility
3)Button durability
4) Aesthetic appeal
5) Add-on support (pass throughs, cups, etc)
6) Price
7) Australian customer support
Based on my logic I chose the Indulgence as the button is rated to 1,000,000+ presses, the most diverse range of atty and battery compatibility. (I use all 4 different atty caps and 5 different types of batteries in it)
Price and support is good.
It ticked all my boxes.
But the main thing is too find what suits you best. Some people seem happy with one type of atty and battery option.