I've had a few of the hybrid drives over the years and wouldn't recommend them to my worst enemy. Real world MTBF is awful and they aren't much quicker in real world usage, imo.
Last Momentus hybrid drive I had lasted a grand total of three and a half weeks. Switched to dedicated, real SSD's for boot drives and WD reds for storage and haven't looked back.
Yeah the first couple of generations were atrocious, but the 750GB model is outstanding (Both performance and reliability wise)
Plus it's the only "SSD" that any 68k Amiga is likely to be able to use without any problems cropping up.
edit: That being said, my A3K runs off an SDHC card attached to a SATA to SCSI adapter with no problems to speak of.