The keyboard is quite small, not to mention already when unfolded completely when you then collapses. Quite in your pocket it does not fit, but almost: o))
So this criterion is met, this keyboard right away. The connection via BT worked well right away, which is not always the case with Android devices. Note here that problems with BT often lie on the version of the operating system and not on the hardware itself!
However, problems appeared with me every now and then to reconnect, but I attribute to the behavior of my Tablets (software). What I do not like that, is the power indicator on the keyboard. Probably to save power, after power (approx. 3 seconds) briefly driven the green LED, then all displays remain dark. Shutdown is unfortunately also not displayed (short flashes would suffice). So one gropes always something in the dark and do not know which part is on or off now.
The keys are in this very compact design of course not the best. These are quite small, somewhat rickety, the pressure point rather spongy and prolific writer rather unsuitable. For a text message or short email the keyboard is really okay. If you want to operate the keyboard of an Android device, will be sure to enjoy a very point. For special keys, such as "@" or "" work immediately and without additional apps from the Play Store. Had some other keyboards tested and none of them was able to deal with these characters. Some then it worked with a suitable app, some not at all.
Conclusion: good keyboard for Android devices and for people who do not have much to write.
After 4 weeks of use, the item is defective! The Micro USB connector has "adopted" into the interior of the housing. Even without use of the internal battery had emptied after about 4 days. Scrap !!!!