Had issues with zf before, but their customer service have greatly improved.
Zion is not great for shipping for SEA; it costs 15 USD to ship from Philippines to SG, and zfrontier costs just $17 USD with much better options of express shipping above USD$100.
Having Zion as a SEA vendor is a joke.
Sorry, should not have lumped the rest together as I do not have experience with the rest; but perhaps should ask around the regions that they are vendoring for to see if their reputation thus far is true.
p.s. forgot that I had shipments from deskhero too; theyre great, so fuss free that i forgot I bought stuff from them before.