Does exactly what I need
583272
I got this device for 3 reasons:

1. Digital to Analog Converter
As a DAC, it effectively is a USB sound card for my Macbook Pro which has adequate but not the best of sound outputs. By bypassing this, I get better sound right away no matter what I am doing.

2. Headphone jack
It's convenient to have a powered headphone jack. I use my headphones a lot at night and they sound great (Grado SR-80s) with the amp.

3. Pre-Amp control for Audioengine A2 speakers
The A2 non-plus speakers are analog input only, non-USB speakers that sound amazing but have a power control knob on the back of the speaker. Aside from the benefits listed above, it also acts as a USB pre-amp for the A2s. I have them hooked up by a 1 meter quality analog 2 channel cable and the volume knob is now inches from my hands at all time. It disables the keyboard volume controls and is much easier to tune to desired volume level.

For the money, ease of setup, features it can't be beat.
4129739
Perfect for my use.  Exactly what I wanted.
4603957
Very inexpensive.. does what I need ..what else can I say
2016472
This is perfect for what I needed at a price I could easily justify.
1349601
Works great - exactly what I needed. I had a program to load onto my laptop and it did it in minutes.
3328107
Solid construction and does exactly what it should do.
4584428
Does what it is supposed to do and does it very well!
2070283
Too many functions overloaded on the power button can make it confusing to do anything other than power on and off, but the unit is lightweight, comfortable, cheap and does exactly what I need it to do for a reasonable amount of time on a single charge. It's not winning any awards, but it's everything I needed at a great price point.
4453312
Easy to use- exactly what I needed. Works great- quick install. No complaints.
2683603
Bought this for my studio a while ago and it does exactly what I need it to do.  Clean power, noticeably lowers noise in recordings and hum in speakers, and provides the right protection for my equipment.  In fact, I had an issue with a storm knocking out the power at my place a few weeks ago, which messed with some of the other appliances in my house, but the studio gracefully shut down and started up again with no problems.

I'll definitely be buying a couple more of these over the next few months.
3239153
It does exactly what I wanted it for and fits perfectly in that spot.
1699132
met my need exactly at good price, would buy again.
3604955
Works exactly as it should for what I need. Very simple and easy.
161639
Works and fits exactly as I needed it - small and flexible with just the plugs I need.
2817118
exactly what I was looking for, gets the job done for a great price
3378953
Exactly what I needed. Affordable. Works good for what I need.
4785788
Exactly what I needed and it works straight out of the box.