I've used them for several cruises. I have my own TA who actually treats me like a person and answers the phone immediately when I call with questions! I really do not like companies who will not talk to me but only will communicate through email.
Vacations to Go will research for lower fares, too. I like their onboard credit, but that small amount in the big picture isn't what makes the difference. And their site is very easy to surf for discounts, especially on upcoming cruises. They also list
DCL discounts for various groups, such as military.
I read another post that their prices are the same as DCL, but for example right now for the 1/21 cruise they have a Cat 7 at $699 pp plus taxes, and the DCL site says $769pp. Both quotes need taxes/fees added, but they are the same.
I may be missing something, and I suspect other agencies have similar discounts, I'm just saying we have had nothing but good experiences with them.