I'm looking closer at the specs of the laptop caddies, and it doesn't look like it's going to be faster than SATA I. It says it is fit for SATA to SATA, and it can bear SATA I, II, III, but it does not say anything about the transfer speeds being up to SATA III transfer speeds.
Does anyone see this like more or anything differently?
This is a link to one of them. They're only $10.