Excellent experience. From start to finish Dream Racing handles with an astounding level of professionalism. Pick up to the lobby is seamless with flawless customer service. The simulators are a nice way to ease the nerves, though there is no comparison between that and the real thing - the best part is to at least familiarize yourself with a bit of the track.
Once you get down on the track, especially if you're a car guy/girl, you will be in heaven. Exotics lined up and down in every direction is enough to get your heart pumping, then you'll hear the sounds of the cars coming past you down the straight. The cars and other equipment are all meticulously maintained. The drivers are very knowledgeable and most importantly are not there to hinder your experience but to amplify it by instructing you which will allow you to push well beyond your limits, particularly as most individuals coming here don't have much/any experience actually tracking cars.
I highly recommend driving the Cayman for some discovery laps, it's a small price in the grand scheme of things and well worth it to get comfortable on the track in a reasonably paced car before jumping in the 488 or other exotics.