I don't use a Fritzbox either, but the router from UPC, but it worked straight away with my PC. It should also work with a laptop.

Hi. Sorry, No, this would not work at all. First of all - it is not for Mac, only windows is supported and the second thing is - this is just a WiFi-Adapter to connect to an WiFi Network and I think your Macbook already hat WiFi OnBoard and you should be able to connect to WiFi-Networks in Hotels and so on (free or pay)