Summary: The warranty on these drives is quite confusing. On one hand, the description of the drive states that they have a limited five year warranty. Yet, when the vendors are contacted they claim it only has a one year warranty. I was assured by a couple of vendors that the five year Hitachi warranty no longer applies to these "older drives".
Summary: I purchased the enterprise HD for performance and longevity. The performance is there but it will be some time before I will know about the longevity. The catch I refered to in the title is that it came installed in a sled which had to be disassembled to use the drive in a standard computer or enclosure. The picture on Amazon is of a bare drive but it's not.
Summary: Went for this as my motherboard will only run SATA 2 and not the current SATA 3. Changing Motherboard and Hard Drive at the same time may have given me problems with Microsoft. Installed HD and installed programs without any problems. If I had known at the time that a SAYA 3 HD would have operated from my current Motherboard at SDATA 2 speed I may have gone that way but probably not.