There are a few things that I like about bestfares. I find their mag helpful. Also I like to look over their Snooze you loose section of their website. It's updated daily
and is only available if you subscribe. It might prove helpful when I retire and can take spur of the moment trips! Like the $198
round trip Denver-London on DL,BA and NW!
I booked an Alaska cruise with them on RCI
with just two weeks notice. 7 days for $599
each for my wife and I and our daughter for
$399! I looked at several other places and couldn't find a better deal.
I've not tried booking airlines with them but I usually book my own over the internet