More detailed charges are now listed
here.
€0.20/min for incoming calls is a bit unjustified, given that they're no doubt also charging a hefty termination fee to the caller's network.
€0.15 to €0.20 per megabyte is expensive but not prohibitive.
It's interesting that foreigners living in North Korea (mainly diplomats) are subject to much lower charges. However, it doesn't specifically state that the foreigner line is available only to residents.