I haven't done it, but I've read lots of reviews of the F! package at RBT, and it's on my list of things to do next time. The photos of the view are good, although some say that it isn't as great as it could be since you still have ambient light from the restaurant. However, we stood right next to RBT when we watched it in November and I don't recall there being any lights on the RBT patio, just inside the restaurant.
The price, to me, seems fantastic. The meal is cheaper than many other packages, and you get to sit on a chair for F!, which is the reason we're considering it. My bones are getting old and don't want to sit on the ground for too long!