Super compact, this device is so easy to use that is becoming a bit lazy almost always using the Auto! The development is done alone, according to the brightness and decor but many other development functions are really good, like the big digital screen, very comfortable to the eye. The unit is ultra convenient to take everywhere. The only real downside for me: it's so flat and compact, with slightly rounded corners, it easily slips from the hands, so be careful not to drop it accidentally! The wrist strap is not very practical because a little stiff and it does not serve much of the slide around his wrist. But that's a detail!