Surfstick Aldi experiences?

Does anyone of you have any experience with the surf stick and the bookable tariffs from Aldi, with which you can use the internet on your laptop if you don't have a connection?

To be able to surf the Internet with your notebook / laptop, you have to insert a SIM card into this stick that has an Internet flat rate (e.g. An Aldi-Talk prepaid card). Then goes worldwide, in the EU countries at no additional cost, anywhere with LTE speed (maximum 21.6 Mbit / s).