A french website reviewed it here :http://www.open-consoles-news.com/2016/06/arduboy-opening-et-premieres-impressions.html
I would suggest you pass on it.
It is not very powerful (it's based on Arduino after all), it has a very minimalist design and worst of all, little to no games.
On the plus side, it is mostly lightweight and it seems to be well built.
If you want something similar, you can buy the PocketCHIP for the same price.
Some people reported quality issues with it tho...
I hope the GameGirl
gets released someday because it would fill a huge void.EDIT
: Apparently you already ordered it.
Well, you have to admit, it makes for a great sex toy.