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Pro Includes retractable phone holder
The phone holder really helps out, as when playing games you'll have both hands on the controller and won't be able to hold your phone. You would need to prop it up somewhere (if you could find a spot).
The arm can fit phones up to 9 centimeters wide. This means anyone with a device that size or smaller can clip it into the controller, making for a convenient form factor while gaming. Because of the width, it can even fit small phones with a case on it.
Pro Support many operating systems
Supports Android 4.3+, iOS, WinXP/Win7/Win8, Android TV.
Pro Built-in rechargable battery (380mAh)
The built in battery provides 6 hours of gaming, which can easily be recharged through a USB adapter as the battery is rechargeable. You won't have to buy batteries, or worry about having batteries on hand.
Pro Has L2 and R2 buttons
Has ergonomically placed L2 and R2 buttons on the back.
Pro 5 multimedia keys
There are multimedia keys on the device that allow control while using multimedia apps such as movie players or music players. This can be convenient for when the controller is in ones hands instead of their device.
Con Cheap feeling build
The controller is light weight and gives a feeling it may break when dropped due to the flimsy design. While this is a cheap controller it would have been nice to have a more sturdy build to it.