Well, Kings Cross may be cheap, but I wouldn't call it nice.
Bit scary round there, don't you think?
I didn't call King's X nice, only the hotel. It's a bit of a rough area, but it's quite safe these days, or at least has been when I've been there. You won't find anything cheaper and a lot of the places that are three times the cost are almost as crappy as some of the King's X hotels.
woof.