Almost perfect - Defective!

I appreciate BT keyboard as it is (very) compact, and yet the keys are well spaced and typing is comfortable. The center hinge is not a problem, and I soon got used to this space "dead." He seems well protected when folded (handy when stuffed into the bag).
The first pairing with smartphone and tablet (Samsung) and a PC running Win Vista was immediate. It was recognized as QWERTY (the first time in the case of the tablet and the PC, to the 2nd connection for the smartphone) so no need commercial software for Android.
The "special" keys work for most (including special keys for audio control, the Ctrl-Alt-Del on Windows, etc.)

And here I think the only downside: the Alt-Gr key malfunctioning, especially characters and @ are found. But that does not really bother me during my editors (otherwise I will look toward the paid software indicated in the manual).

Edit: the keyboard can not be charged because the socket is loose and sinks in the body of the unit. Manufacturing defect?