I've been using Intel S3700's for VSAN with vSphere 5.5, but hearing good things about Sandisk.
I noticed that the Intel 36xx series is now on the HCL for capacity tier (which is nice as they cost 1/2 the price of a 3700 and will make all flash cheaper).
After a million arguments with people wanting to use Samsung 840's I finally collected my thoughts and conversations into a blog post on selection criteria etc.
http://www.synchronet.com/blog/how-to-pick-the-right-vmware-vsan-flash-device/
I'm curious about what people are using out there, and why they are using it?