Their GEO mix is not as strong as some other large sites in their range so keep that in mind. If you have a truly global product, you should be fine or if you are GEO targeting to specific Countries, you should also be fine. They have a lot of volume so make sure you are ready for it.
On another note, make sure you are actually dealing with them, I think Roman had his skype ID hacked and stolen the other day so I'd hate for you to fall victim to the guy who is in control of it and pretending to be them, ripping people off. Be alert.
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