I've had good, but slower than average, 
experience with Mangaya. Of course, I am basing 
this on some dealers and private sellers who 
reply to my requests within hours! @_@ 

But the staff has always been friendly and 
courteous and if they say they'll deliver, you 
can depend on them. 

Just my two cents worth. I know there are some on 
the forum who will disagree with me, but I like 
Mangaya and have had nothing but good experiences 
with them.