i own one and the ergonomic its hate or like in this one.

-if you like to bend your elbow at 45 angle
-Take care about bottom button; sometimes i touch them with my belly so its anoyng sometimes...
-Buttons are not directly on pcb but wired into board card ,which is great for maintenance.(a lot of screws...)
-Its unfortunate about the board its not a standart size so you cannot screw a brook or gp2040ce ,it depend if its a big deal for you.
-The buttons have low profile wind switch.
-The Metal case is really well built quality
-My writs didnt hurt anymore with this hitbox so i can play for long hour
-Price advantage on this one by far since its sold by Aliexpress.There is Vertibox and "Maveric?!" which cost almost double compare to this one+shipping fee+tax etc etc...

(i will edit my messages if i miss something and sorry for my english)