Slower than 512GB 840 Pro
The CrystalDiskMark results for my 512GB Samsung 840 Pro are better in every category:
528.9/504.2
474.7/492.7
38.65/124.4
392.8/354.5
This drive cannot be used in a laptop because it draws so much power under load (and at idle) and it generates so much heat.
This is a niche product for Intel fanboys who are looking for Intel reliability and are willing to sacrifice performance.