It's as fast as any other 7200rpm drive these days. But you don't buy a hard drive for it's speed, although you certainly probably also don't want a 5400rpm drive because then it will REALLY crawl. You buy it for the fact that you get a lot more storage capacity for the price than with an SSD.
If you want speed, buy a solid state drive.
As far as being reliable, the backblaze data seems to indicate that they are AT LEAST as reliable as any other brand, and potentially, a bit MORE reliable than some.
We review the quarterly and lifetime failure rates for our 178,166 data drives and compare the failure rates of HDD and SSD boot drives.
www.backblaze.com