Apple has recognised the need of upgrading the SSD on Macbook and after the OS X 10.10.4 update offers the ability to trim to their new SSDs. OWC can be trimmed is when the data is written on an SSD and sorted inside a page. Inside of the page there blocks, where the data is protected in local units call LBA (local block address). This registry knows which of the pages are containing data and in which parts are located on the SSD. The data write process starts on a blank page when the other data is deleted, yet the new data is not deleted from the pages.
My personal choice is the OWC SSD, which has always been supported by Apple and is the technology that is created to offer you great performance, speed and longevity. Even though there are other third-party manufacturers of SSD, OWC is the undisputed ruler of SSD – making your laptop fast and feel like a brand new.