SD cards have become cheaper and cheaper on a per-MB basis over the last few years. This has led to multiple SD cards per user and PDA – protective cases are usually not capable to accomodate for more than one or two cards though. Proporta’s keyring is intended to simplify transportation – lets see how it fares!
Inserting an SD card works well after a few attempts – removing the card works well too due to the stylus.
The manufacturing quality of the keyring is excellent – I have not noted any kind of problem with it.
Overall, if you want to store your memory cards on your keyring, this thingy is the way to go. Product quality is good, and so is design and functionality. The overall price of the unit is a very reasonable 3.95$.