ABSOLUTELY IN-DIS-PEN-SA-BLE !!!

To be clear handheld consoles are not references in ergonomics.
The "angles" are uncomfortable, and access to sears can be complicated, the console sometimes slipping out of hand ... Really not the best when it comes to playing games that requires a little more dexterity that Mario !!
With this grip: no problem !!!!
It gives a rear allowance perfectly thought, and very comfortable, like the Xbox controllers.
Your gaming experience will be even more pleasant and comfortable !!
Shuts pen, power button, the sears to the headphone jack, the infrared port and the recharging plug
Warning: simply blocks access to the cartridge. BUT: starts and comes off VERY VERY easily!
I thought it would be disturbing, or that it was going to break the power, but not at all in the end!
Only downside: deserves a rubber (just slip?) Nicer than plastic ABS hard, but it's really a detail and a personal preference. Do not see a defect :)
Given the low price, I strongly DO NOT recommend, I WILL TAKE THE SUM OF !!! ;-)