I've never personally used this company, but I looked over their site. Depending on where you're drop shipping to should play into your decision to use companies. If you live in the US and are selling to the US, but drop ship from China, you have to take into account many things, including the actual shipping and delivery time. It can take up to a month to get an item from China to the US.
I don't like this about Chinese companies, so I stick to domestic ones. I would also do a quick search on other retail shops for similar products and make sure they're price is fair.