"May be unreliable"

I find this card seems to frequently stop working altogether and have to be reformatted, or simply re-seated. It's hard to know if this is the fault of the device I use it in (a cellphone), or the card itself, so I can't really hold that against it, but all I can say is that's been my experience with this card, and not others.

"Worked perfectly in my Surface RT"

We were going on vacation and I wanted to take a bunch of digital media for the long plane flights and for chilling during downtime. This chip took everything I needed and worked without issue. Glad to see the 128GB chips on the market, looking forward to the 256GB ones!