If someone short on money then it’s OK, but bottom line is that this hotel is not too dirty , it’s outdated. Mainly works for one night stay bus travelers , but be ready when two buses group check in then you may wait for half an hour to get elevator for your floor.
Again I love the are of Karlin but got to this hotel incidentally, so don’t make the same mistake, it’s not worth the savings, there are plenty of choices in Prague.