There's not much that's extreme about the SanDisk Extreme solid-state drive.
In fact, it's very standard, with a 9.5mm 2.5-inch design like most laptop hard drives. In my testing, the drive boosted the test machine's overall performance a great deal. However, that's what you'd expect from a SATA 3-based SSD; again, standard.
What makes the drive just slightly different from most others is its aluminum chassis, which makes the drive very sturdy and good-looking, though not as good-looking as the Samsung 830 series. Where the SanDisk is more appealing than the Samsung is the pricing. The Extreme comes in capacities of 120GB, 240GB, and 480GB that cost $180, $318, and $799, respectively, so it's one of the most affordable SATA 3 on the market.
This $1.3-per-gigabyte pricing more than makes up for the Extreme's average data transfer performance and it's one of the best SSD values right now, especially the 240GB capacity.
For more information, check out the full review of the SanDisk Extreme SSD.