I personally don't really like Yesasia. I ordered from them before and it was a kinda bad experience. :\ (Ordered a Japanese version CD, got an overseas. Tried to contact them about it and they ignored me. >.< A few months later (no, I'm being serious

) they FINALLY responded, saying I could send it back and they'd give me the right one. I requested a refund, but they wanted me to just get another copy from them. I ended up just giving the copy to a friend and ordering from CDJapan.

) I've actually heard of many people having similar problems with them, too, so everything has turned me off.
Aside from that, I can't always find what I want there. (In their defence, though, I want kinda obscure stuff.) Plus, I like CDJapan's coupon system better. Oh, and I used to strictly not want to order from them because they didn't count towards Oricon, but that doesn't much matter now...
I love CDJapan, except for the fact that their shipping is ungodly. I've heard some people say it's cheaper for them with CDJapan, so I guess it's where I live. But it really sucks. I'm talkin' fifty USD for a few CDs. O_O I should try HMV....