The device is highly recommended for a specific audience and there are good reasons why I keep it:
1) The sound is very good, and without competition in this price range
2) The device is extremely small
3) A battery life of 90 hours is reached almost no other player
4) There is an FM radio available, very convenient
5) The memory can be expanded with Micro SDXC cards
Below I still explain for people who are facing a similar decision why certain alternatives have not taken
1) Fiio X5: runtime is a joke; The players have no memory and thus is the X5 eg already twice as expensive when you add in the memory card. The interface of the X5 does not tear me from the stool, he is extremely large
2) Plenue 1 / Astell and core / Colorfly: are only suitable for people who really believe in hi-res music. The M2 plays FLAC, and is enough for me. The term of these expensive cars is partly a joke; Due to the mostly built-in battery lifetime the player is limited to two or three years, which makes them extremely expensive. For that I can think of five to ten times the M2 buy !!
3) Sony Walkman: The XZ1 has similar restrictions as the aforementioned group, also seems to me a cell phone, the cell phone is not funny before. The A15 would be an alternative, but has compared to the M2 poorer sound.
Conclusion: If you really want to especially have a music player and much more emphasis on sound, space, battery life, and a handy radio, with the M2 in this price range simply the best advice, even if the control only needs training.