What models? There's a big difference between the cheapest and the more pro models.
That said, my four 2Tb Barracudas still going fine after many years (10+). One failed, replaced with a green. Big mistake, that failed quickly and I went back to standard Barracudas.
I've had terrible luck with those drives, out of 12, 10 failed within a couple of years. Not a same batch issue as they were purchased over the period of about 6-8 months and not even from the same place.
Yet I've got Toshibas that run hot and are loud as heck that seem to keep going forever.
That said, my four 2Tb Barracudas still going fine after many years (10+). One failed, replaced with a green. Big mistake, that failed quickly and I went back to standard Barracudas.
They don't get used intensely though.