I posted this response under a different thread but want to share my experience here again because more people should be aware of this:
I was dissatisfied with WES because it had taken too long, they constantly missed documents (had to resend many times), and the agents are not responsible.
First, the official timeline to finish an evaluation is NOT 7 business days anymore, but 35 business days.
Second, everything was SLOW. I had to mail my transcripts twice and send e-documents four times because the system said my documents were missing. I wrote four times to the customer service for help with finding the documents, but nobody really took care of it (I either received no response or was told again that the documents were missing). Review took more than one month - it's already two days after the due date but the status is still "in progress". They were pretty quick at receiving money, though. Charge is very high and not worthy.
If you are in a hurry, go somewhere else.