Yes, I did end up doing it. The total for my Friday-Monday rental was around $50 for a 9" screen, which included 3 DVDs, tax, and the optional $1/day insurance.
When I got to the kiosk, most everything was all ready for me. This was where I got a little worried. The guy pulled out the DVD player to verify that it was working, and the battery was charged... he went through FOUR DVD players before he got one working for me. I had reserved an extra battery (free of charge), but I had to remind the guy about it. He seemed a bit annoyed at the request. The other (but very minor) disapointment was that they didn't have one of the movies that I had reserved. So, I made another selection, no big deal. (it comes with one free DVD rental per day)
The DVD player worked flawlessly, and the battery life was excellent (About 3 hours, maybe more if you pushed it). It came with headphones, but I brought my own.
People at the airport were eyeing it, and asking questions about it. When I got back to Orlando, I just dropped it in the 24hr drop box.
Overall, I enjoyed the experience. Would I do it again? Possibly. I could certainly live without it no problem. But it was a nice treat. If I happen to get good airfare, and can afford to splurge for it, then I certainly will.