"Popular" depends entirely on who you ask. This thread has a definite bias towards the Samsung, but I disagree and would never buy anything from that company. All of the major brands have their fans. In my opinion, get the largest SSD you can afford choosing from, Intel, Crucial M4, OCZ, OWC or any other brand that has the capability to use a Mac-based firmware updater. The Samsung SSDs cannot be upgraded on a Mac. I have had good performance with the Intel 335, use it for boot drive, some storage and daily work on a late 2011 MBP. Solid, no issues whatsoever, with Trim enabled. 😎 Most of the SSDs available today are very stable. What MBP are you going to install your SSD in?