I went with SYBE because they were the cheapest. It was explained to me that they keep credentialing cost down since a lot of their credentialing clients move over to be their billing clients. At first I was frustrated with all the information I had to give them but it was explained to me that all this information was needed to fill in the applications. There was lots of help and direction from Linny on how to get the information needed i.e. NPI 2. It took a day or so for me to get an invoice and pay for the services. Each time I called or they emailed me, I was told the applications were in progress. I was feeling uneasy since I could not see anything happening, but voila a month later I had my three contracts. I have to say SYBE did what I paid them to do. I am happy with their service.