The Darkmoon is the smallest and most powerful of the series "Dark", it has a format that I find ideal for a smartphone screen is superb, the Android system very classic and easy to use, it absolutely takes pictures GORGEOUS and can play a lot of video formats.
Be careful with batteries whose longevity is short, the GPS has trouble finding the signal, and Sim cards / memory cards that tend to not be recognized by the device when it is too hot or is overstretched. But these problems are also found in other manufacturers for a much higher price!
I also regret that the battery is not removable, and I warn about the format of Sim cards: there is a normal Sim port and the second is a micro-SIM port, so at least one of your cards should be reduced size!
