I am thinking about upgrading my SSD in my MBA, which is a 128gb (APPLE SSD TS128C) to either and OWC model or a Transcend Jet Drive. I would like to get more than 128gb, which is easy. However, I am just wondering if it is really worth it? I know that I will not get the full speed benefits since my MBA is older, but is there ANY speed increase I will get or none at all. I mean, I still have 27gb free but that is because I do not keep all my iTunes movies downloaded on the MBA, and keep other large files in the Cloud or on an external drive. I do keep my large iTunes music library on the MBA itself, and then obviously any apps I download. I have read bad things about OWC drives, some complaints being that they use the SandForce Driver, and that many people have received drives that do not fit and have had to modify their Macs to get the OWC drives to fit. I am unwilling to do that, so it appears I have to go with the Transcend Jet Drive 500, 240gb version as that is all that is supported due to SATA II that my MBA uses. One last thing, if any knows of any other companies that offer SSD's for Macs that are reliable, and high quality please let me know, especially if I could get more than 240gb of storage. I appreciate everyones responses in advance. Thank you so much!