Depends on your needs. Mostly ppl check on their reputation and second thing is withdrawal method. See either their withdrawal will be an issue with you or not?

For me I'm been using XM.com due to his specifications more to Asian needs. Local depositor also available. Check out my signature.

If u subscribe with local depositor, it will be few hours time. Or u don't wan to have any transaction record, he can pass u cash as well if you are around KL area.