I need an SSD to partition in to a couple of boot volumes and I'm looking at OWC Mercury Extreme Pro 480 or Samsung 850 Pro 512. The Samsung was named best ssd of 2015 by a reviewer and is the first consumer drive to feature vertical 3D nand (whatever that means). It's said to reduce footprint and make for cooler, more reliable operation. There's a 10 year limited guarantee. The OWC drive has some cool sounding specs too, at a 10% higher price. Their web site goes in to more detail: The Mercury SSD line features: DuraWrite™ extends the endurance of your Solid State Drive (SSD). Intelligent Block Management & Wear Leveling automatically distributes data evenly across the entire SSD. Intelligent Read Disturb Management spreads the active read/write across the flash components eliminating data corruption caused by constant use. Intelligent "Recycling" for advanced free space management gradually re-writes data across the SSD over time to ensure data never gets corrupted. RAISE™ (Redundant Array of Independent Silicon Elements) protects the data on your drive similar to having a RAID setup. Best-in-Class ECC Protection for longest data retention and drive life. The drive is actually a 512GB drive with around 7% reserved for data management with the above technologies. I have used a 240GB version of this drive for several years as boot drive for a CMP 5,1 without problems and have upgraded firmware, which OWC makes an easy process. It has been reliable and is fast to boot and run. I would like to hear from anyone with experience with the Samsung drives. Also, are the features of the OWC Extreme drive NOT commonly found in one form or another on other drives, or are these more proprietary names rather than technologies?