Answer: From "need" can be no question. But it's sooo much fun!
In any case if it so super easy, fast and cheap is like the Canon Selphy: simply connect any installation orgies, Download Free App for your mobile phone to connect to the printer arm and print. Is really quite simple and reliable - the printer creates its own Wi-Fi spot, with which one can easily connect via mobile phone and you can already print straight from your phone photos. Reaction of our children (clearly grew up in the post-print photo-Time): "Well that's sometimes really cool!"
It's fun, fast print a few photos at the birthday party, on vacation or on other occasions times and then to hold in your hands. Photos are printed borderless, and good quality, "front" and "rear" is a white stripe, but which is pre-punched on paper and can be separated. Another reviewer has calculated that 1 picture will cost you about 28 cents - the price I find ok.
Conclusion: Does not need one, but it's great fun. In addition, the device looks quite chic and so small and handy is that it can unobtrusively in the living room or even you can take it anywhere.
Note: It is supplied without a color cartridge and without paper, so order them together.