dittoing in on the ease/success of booking online
the only twist is that sometimes you can get better deals if you determine the online price then call the vendor - they will sometimes give you a price below the best you can find online (this works for insurance as well as hotels, in my recent experience)
that's kinda sorta what happened to me.
After booking, I was just looking around, and saw a discount code where I could get a car from that agency for $30/day....rather than I think $49. Just used the code myself, then cancelled the original booking.
Oh....a little off subject, but might save all of you some money....
No matter WHAT I buy on line, before I make the purchase, I'll google for a discount code/coupon.
For merchandise, I can find at least find a code for free shipping almost all of the time.
Ususally, I'll find a deal for free shipping and 10% to 25% off what I'm buying.
Many times I'll find I can buy an even better product, at a better price than I was originally going to spend.