I collect important information from the other GG's thread to put them here.
GG's advantages:
1) GG's button is in an ergonomic position and you can ajust it's path, it's hardness and it's look. Also you can move the button in front of GG (in some models)
2) GG's button is very small in dimensions and only 5mm from the case (9mm in security button model)
3) GG is the slimest in the market with 20 mm diameter. (23mm to Trans model)
4) GG's button can be locked when you carry it in pockets or bags (in Trans model and to the updated ones after the 9th July recall).
5) GG has the best throat kick.
6) GG has the best smoke.
7) GG does not use wires, soldering, glues, epoxy, pushed objects and ready from stores products (except atomizer and catridge).
8) GG is very pretty and has engraving on it (options for gold cups and personal engraving)
9) GG works with 2 kind of batteries (cr2 and AA), without buying 2 devices. (Trans model works with any kind of batteries)
10) GG works with 3 kind of volts (3,7 and 6 and 7,4) without buying 3 devices.
11) GG is light (45 gr).
12) GG will never need service. Even the button is unbreakable.
13) GG's battery connector is sealed from the e-liquid.
14) GG does not roll, it stays where you leave it.
15) GG is a solid construction.
16) GG's batteries get charged very quickly (2 hours) and keeps 3-4 hours for very heavy smokers. (For the 3,7 volt option, batteries can last up to 35 hours)
17) GG will never get damaged by accident or malfunction.
18) GG's dripping is easy because you dont need to hold it in your hands, it stands on a table in straight position.
19) GG's length can vary from 45mm to 99mm (it depends on what battery it holds at the specific moment)
20) GG comes in 6 versions: Grant, Nano, mini nano, SuperSlim, Trans and the new one
21) GG is armed with auto-feeding-liquid system. You dont refill carts anymore!!!
22) You can adjust how hard or how soft you inhale.
23) You can put button in 4 diferrent places.
24) Compatible with cartomizers.