Yeah, we are generally friendly to foreigners but of course there are few minor problems like always.
Nowadays, you won't get to see them, we used to have active nazist groups in our country. Most of them were just delinquents, who would attack foreigners(mostly Chinese) in the name of keeping our country "clean". I haven't seen them for a quite some time.
Also we have issues with our manly ego. Some of our men are too damn proud of themselves that they look down on others, it becomes evident when they are drunk. But the main victims of these problems are mostly us, they only partly concern foreigners.
I guess language barrier would be the main issue for those who don't speak Mongolian or Russian :S
English is being taught in Mongolia and I think about 1/5th of all people there should able to understand a bit of English in the capital city.
If you ever decide to come by, we could hang out =)