It appears the Aldi modem doesn't even come with a SIM or any free data allowance. (Though you can obviously buy the Medion SIM in the same shop). So it is literally just the Modem they are selling for 59 Euros. I am comparing that with Aldi in Austria (though they are called Hofer there) who sell you an Unlocked Modem and SIM which also includes 1GB of data useage for 55 Euros. A significantly better deal.
Do German users of this site know if there are other places in Germany you can buy an unlocked USB Modem for less than this? I know someone in Germany who desperately needs one, and something tells me this deal by Aldi is not that great.
I am just comparing with the UK where I see o2 are selling unlocked Huawei E160 modems for 29 pounds (around 34 Euros).
O2 Mobile Broadband
A short while ago during a speacial I managed to get a E169 off them for only 15 pounds!