I have, but not for Orlando. Basically, the offers and terms on the site are identical to those found in Exit Information Guide booklets.
When we went to Pigeon Forge TN (Dollywood) this summer, we knew we would be stopping for the night in Staunton VA so I did a search and printed a coupon out for a Microtel at a rate of $46.00/night. When we arrived, they honored the price no problem, and it was a delightful hotel, though smallish.
If you have any doubt, the hotel's phone number should come up with the coupon. If you find a hotel at a price you like, just give them a call and ask if they really honor the coupons, just to reassure yourself.
Good luck,
Mary