Excerpt: Have had many Seagates over the years (10+) had one fail, soon after powering up. So for me that's a 10% overall fail rate. Then there was the Barracuda problems and firmware issues of 5 or so years ago.
Summary: I bought 2 of these just under two years ago. One has just recently failed. I don't use them very heavily. If I had the time, I'd order another one of the same to replace it. But I'm not sure I can wait. Plus I may prefer to upgrade to 4TB this time around.
Summary: This drive is known to have a high failure rate. You can search on What Hard Drive Should I Buy and backblaze to find statistics regarding the drives longevity. It is also important to note that the drives mentioned are consumer drives and are being used in an enterprise application.
Summary: I have no issues with this drive, but I do have one concern. It rated mid range between pass and fail in Temp Changes running a Tech Tool Smart Check. Not sure if that is going to be a problem. I hope not. I have it installed as a secondary drive in a Mac Pro 4,1 2.26 GHz.