[TheMadBrewer]

I thought I'd add my 2 cents to this.

My brother and I bought one during the December promotion. We filled out a form, using our hotel address and returned to the Tchibo store. I seem to remember we also had to call a number to activate the SIM -- I don't remember if we did that from a mobile or whether we put the Tchibo SIM into unlocked phone.

The stick worked fine in both my brothers window laptop and my Macbook. The software automatically installs when you connect the stick. It worked flawlessly.

I am headed back to Germany next month for three weeks and I hope to use it again. It appears (thanks Inquisitor) that all I'll need to do is purchase a €20 top up and then using the software loaded from the stick, send an SMS to activate.