Cheapest I can find for the 32GB version, as part of their Deal of the Day promotion (that lasts about a week).
I think it's perfect for those who do not need so much storage (or buy two of these and still be cheaper than a 64GB one) yet want some wriggle room from their phone's internal storage.
Build quality-wise supposedly less problematic compared to SanDisk's offering. Specs are in the link.
Damn, that's a decent price for these, but with the shipping you'll want to buy more than one to get your money's worth. I can buy 2 on eBay for about $45, but this way I get two for $38 (including shipping).
I've got a 128GB one already which is so handy to have at work. Love being able to plug it into my phone to grab stuff off it.