Anyone ever book a cruise through vacationstogo.com?

The fiance and I are looking at booking a short cruise through them. The prices sure seem reasonable. Any caveats to be aware of?

My BF and I were planning on doing the same, so i would like to know as well. I think I would ask about trip insurance and what kind of guarantees they have. We are thinking about doing a Alaskan cruise on Norweign Cruiseline. I just want to make sure the tickets are valid. That is my main concern.

My parents have used them several times with no complaints. Another to look at is 7blueseas.com. I have a friend whose family booked from there and were happy as well.