To my phone LG G3, so the read speeds are very correct in writing against much less but still very decent for a phone.
Reading: ~ 80MB / s
Write: ~ 40MB / s
His must come from the phone or application as I tested on an Android app, not tried yet but if its PC must be much faster :)
bred no card exceeded 40MB / s read even the Sandisk Extreme (37MB / s) 45MB / s and 17MB .... Announced / s write !!
In short if you think filming in Full HD, or even 4K through the slow motion I recommend this card with eyes shut !!!
It is obviously currently 56 euros (and less expensive than the Sandisk Extreme 80euros more ..) At that price it's a treat :)
PS: if my review is a bit old and you read it and it is still less expensive over time, you are still more business: p
