I got one of these yesterday and I must say it worked right about of the box. Was moving some large files around and it was pushing 70-80mbps. So I am very pleased with it. I know it is not the cheapest price, but is a very attractive price point.
So your drive was pushing 8-10 MB/s? That is very slow for a hard drive
There is a big difference between mbps (mega bit) and MBps (Mega Byte).
2.5" SATA HDD gets about 100-120MB/s
3.5" SATA HDD gets about 180-200MB/s
SSD gets 400-500MB/s