Pros: Excellent SOund
Cons: Only uses 64GB of the claimed 192GB of memory. Indexes songs alphabetically.
Do not buy an Astell & Kern 120. It claims 192Gb memory, but it indexes and uses only the internal memory - 64gb. The external SD cards carry files but do not show up on the device. Money spent on the two mini SD cards is totally wasted - the files for all intents and purposes do not exist. The software index the tracks alphabetically so you must listen to your music in random order. When using iRiver Plus4 the software does NOT rollover automatically from one memory unit to the next, so you have to monitor your usage constantly - takes forever to load the device with music. Buy a 5.5G iPod which has the Wolfson DAC already in it. Have Rapid Repair upgrade the memory to 240gb and you will have a far more useful music player at 1/3 the price. The reviewers only transfer and listen to a few files so they have no idea how the device actually works. There is no intention to fix the software defects. There is no customer support. It is a rip-off and guilty of false and misleading advertising.