No Problem
I did not even realise Seagate offered 5 years, I buy them as they are super quiet (Barracuda is anyway) I thought Google had shown figures showing no real difference between HD manufacturers (ok they probably use enterprise drives) and that most discs either fail within first year or go on for 5 years.
Only manufacturer I have had problems with in last 15 years is IBM with the click of death which took out 15 out of 27 drives in 1 year. Other than that they (WD/Toshiba/Seagate) all seem much the same.