Re: Awesome drives..
I just ordered a 512GB 850 Pro yesterday, and was pretty happy with it until I realized it did not have power fail protection, I was looking at the Intel 730 before that which does have power fail protection. The drive is going into a 4-year old Toshiba i7 laptop that spends 99% of it's time plugged into the wall (currently runs off a Momentus XT 750GB hybrid).
I imagine the likelihood of serious data loss due to power fail/system crash is probably low but this has been on my mind today. I had a crucial SSD a few years back get pretty large data corruption after a power failure(UPS battery was dead and when self test kicked in the system went down - this was in my home not a business!).