Pros: 1. Low profile
2. Quiet
3. Old system supported (try the R7 240, it won't even boot)

Cons: 1. Driver support is going out soon.
2. The performance is actually worse than Intel HD4400/4200 internal graphics accelerator.

Other Thoughts: To this day and time - early 2014, the use of this card is marginalized. I can think of someone wanting to pop this in a Sandy-bridge-era Pentium/Celeron board, but if you are building new HTPC/PCs, you better use the onboard graphics and invest in an i3 (Haswell) instead of splitting the capital between a CPU and a Video card. I have done benchmarking of this with an i3-4130. Believe it or not, the onboard graphics is around 50% faster than this card, while consuming less electricity and generates less heat in combination.

Pros: 1. small and compact
2. pretty quick, well it's USB3.0 after all

Cons: 1. Filmsy at best. And the circuit board is held by double-sided tape...
2. It's hard to get drives out. I had to use a toothpick to pry my SSD/HDD out of the case... I didn't bother with the included padding which seemingly will make getting the drive out even harder!

Other Thoughts: I ended up separating the circuit board out of the case and just use it as is. Speed is good but design is pretty bad. It does have a power input which I think should be 5V. In that case it might have a chance to power up a 3.5" drive (let alone the 10K rpm ones though)