Do ALL Asian people necessarily know how to cut Asian hair? Hell, no. About the only advantages I've found were they are generally cheaper, and you aren't as embarassed to go in with a picture of some Hong Kong popstar and demand they make you look like him/her. If you're lucky, they might be playing KTV, Korean soap operas or wacky Japanese gameshows on the television, so at least you'll be amused instead of bored or forced to talk to your hairdresser.

I think a salon is a salon. You have to search for that one awesome hairdresser, and the only way to find him/her is through trial and error.

So in conclusion- home vs. salon?
Home:
Pros- CHEAPPPPP, 24/7, don't have to chitchat with strangers, no weird chemical salon smell
Cons- Um, you can't see the back of your own head? Hard to cut "style" unless you are well-practiced in haircutting

Salon:
Pros- Name brand stuff that smells good that you probably wouldn't ordinarily buy, it is sooooo nice to have someone else wash and massage your head/scalp
Cons- It's a gamble- kaching- you don't know if you're paying for a good or bad haircut; you are at the mercy of someone else; you have to make appointments