I've used them twice:
the first time for a Regent cruise. We booked 3 cabins; got a decent price. Airfare included. I used them again for a Seadream cruise as well. No problems. They were always able to throw in a good amount of cabin credit.

Actually now that I think about it, the Regent cruise had a promo going with additional cabin credit when I booked the first two cabins. I went back later and booked the third cabin thinking that it would get the credit as well. Flash forward to the cruise: it didn't, though we didnt realize this till the end. I sent VTG.com an email and they actually cut me a check for the amount.

I worked with a specific agent at VTG, who was good at communicating over email. I did get him from a random inquiry to the website.

So two good experiences. We went with a Seabourn specialist for out last cruise. Great price, and he actually sorted us out a nice upgrade (for all 3 cabins!) If you are thinking Seabourn PM me and I'll send you his info.

FDW