Sandisk Ultra II 2.0 GB SD Card - defects?

Hi,

on Amazon.de a couple of buyer's comments surprised me: Three of them said that they couldn't read the cards after a couple of uses.

For those of you who understand german:

http://www.amazon.de/SanDisk-Secure-Digital-Speicherkarte-Retailverpackung/dp/B0007QU7JQ/ref=pd_bbs_3/028-0898393-9698934?ie=UTF8&s=ce-de&qid=1191770972&sr=8-3

As this is the first time I hear something about data loss with Sandisk cards, I'd like to know if anyone can confirm the lower quality.
Else, the price of EUR 12,74 is just too tempting to not buying them.

Marcel