I just ordered 5 more. They're fast, they're good looking, and they've survived a week of torture going from +120 Fahrenheit to minus 40 and pushing from sea level to flight level - all faster than any of my other cards in writing. SD card lingo can be confusing when you want the fastest card - speed at this size and durability were my main reasons for buying it. For example, writing something that took 1 minute on this card took a lot longer than 8 minutes on some of my other branded cards with words like "Ultra". It is also puzzling that Revain's Gigastone sales department had not even offered these 16G speed U3 cards for sale on their main presentation link.
SmartBuy Classic Series microSDHC 32 GB Class 10, R/W 25/30 MB/s, SD adapter
41 Review
Memory card Samsung microSDXC 256 GB Class 10, V30, A2, UHS-I U3, R 130 MB/s, adapter to SD
50 Review
Smartphone Xiaomi Mi 8 Lite 6/128 GB, midnight black
70 Review
Smartphone ZTE Blade V10 Vita 2/32 GB, Dual nano SIM, graphite black
50 Review