Pros: Build, Sound and price.
I've recently got into a bit of the budget audio bug, buying a small list of head/earphones over the past 2 years including Shure SE110, Klipsch S4, Klipsch X5, V Moda M80 and finally my awesome Soundmagic HP100. I'm still learning allot about audio and what sound signature I like most but its an interesting hobby that doesn't require a ton of money if you don't have it and that brought me to the HRT Headstreamer. I've read allot on these new usb DACs that supposedly sound as good as ones many times more pricey and that sounded good to me as I like the idea of improving sound on top of the headphones I already have. Still not sure exactly how something converting a bunch of 1 and 0 can improve sound but it works.
Its like when your ears pop and everything sounds clearer and bigger. the sound stage opened up and everything is much easier to decipher. I can listen to Gorguts (death metal) and clearly hear every instrument which says allot because death metal is a very condenced music with evreything being played fast and equally loud, often becoming a wall of sound that makes it very difficult to distinguish various instruments. I'm getting the impression that this is a real "audiophile" type of sound coming from this DAC as nothing is coloured at all, it simply reproduces a very clean sound.
For the price I paid its an incredible deal and still is at asking price. It is made in the US of high quality components using an aluminum tube with durable plastic face plates. The design is great being very minimalist which means less noise and things to go wrong which also appealed to me. I have read some complaints on the lack of a volume knob but having this attached to a computer, the computer's volume is very convenient. I don't have to worry about a volume knob busting off when traveling.
This is a great portable product that vastly improves the sound of any computer for very little money. I'm a happy customer.