Summary: I have a classic Infrant NAS, love it and it uses this brand of drive (although I originally started with 250gx4 and upgraded to 1tx4) and they perform solid and last a reasonable amount of time for drives that are worked extensively and constantly 24/x as part of a NAS but they do rise in SMART sector relocation counts fairly rapidly (2+ / day) once you reach about 1-1.5 year of service. Not the greatest performance record but certainly not the worst for a work horse.
Summary: Worked ok for a while Now the drive fail after 3 months only, I should have exchanged it when I ran CrystalDiskInfo showing high number of reallocated sector and head access errors! Now I have to throw 12$ to RMA the drive!!!