Yes, currently expensive, and price is still falling!
But, now nunmal TOP, for my Sony Xperia Tablet Z3 Compact :-)
As fast as internal memory recall!
I separate stands's apps (applications) in internal (device) memory and files (SD-Card) Music, Video, Photo, etc.)
Life, well, 2-year warranty, in addition I can not say anything yet: - /
Let's see and then report if necessary :-)