Very good points/info.
A lot of people think because they moved part of, or maybe one app to the sd card, that all apps can be moved to the sd card.. IMO, no way. I use my sd card storage for movies, personal vids, pictures and music..I heard the Notes can't read but 30something so that 90 or higher, IMO, can't be utilized. I have been using the Sandisk 64gb Ultra, no problems whatsoever. I think people that have problems, could have one of those fakes, don't format the card in the phone, and/or disconnect when writiing...
I got the 128, that is overdamkill to be truthful. That $31.99 deal for 64gb sd class 10 is the best deal going IMO. I paid 3 times and more for the 128, and I don't have 3 times space or 3 times the performance of the 64gb. However, I do have 128gb BRAGGING RIGHTS!!