I use Matrix software to figure out air travel and book it directly with the airline. Airlines are moving to the model of cutting out the resellers. They guarantee the lowest prices by booking directly through them now. Some even are penalizing you through 3rd party sites by not offering seat availability, extra charges for baggage or not giving miles. I usually book direct with the hotel/resort also. Many of them are going to the same model as the airlines, with guaranteed lowest rates by booking direct. Last trip to Florida Keys the best room rate at the place we wanted to stay that I could find anywhere online was about $2800 for the week. Went to the resorts website and they had a special listed for exact same beach side room for 15% off which was $420.00 savings.
In my opinion the travel sites are most of the time the worst method to book with.
1) You can do better booking direct
2) Hotels hold it against you when they get your reservation through the travel sites. (some people say no way, but it's been proven over and over again that it does happen)
3) Most of the 'best' deals through the travel sites are not the optimum types of rooms or flights, crappy locations in the hotel, and weird flight schedules, that's basically a big part of how they give 'deals' by offering the stuff the hotels and airlines have a hard time getting rid of.
Just got back from Breckenridge over X-mas, wife booked the room through travelocity. Arrived at this nice hotel, all valet service, right on the slope, with a lift to the slopes, etc.... go to room and it's a freak'n nasty handicapped room, felt like we were staying at a nursing home over Christmas instead of a 4 star resort. That's when I asked my wife how she booked the place and she told me travelocity. God damn them but it's our own fault. No way to change rooms during solid booked week of Christmas. But wifey got a deal on the price.