Just watched the video, and it looks nice, but it also looks like you will be bored if there is a l.ong line, not much to look at except blue and silver walls. The design concept is a great idea, but remember it is for groups of three, so what happens when there is just two of you, and when kids/adults/Brazillians want to create their own vehicle, who is going to monitor that? I like the futuristic aspect, but somehow it gets lost in the ride with just neon lights and tv screens, where as TT1 had some show to it and a good story. It may not have been well maintained, but proved its point in the end. Still the same ride, more next gen, more future world, but less involved(road block test, hills, chambers, even leaving the building onto the track) just not enough explanation and build up in my opinion, but that may change on my next trip.
The design kiosks accommodate up to 3 guests, but if you are a couple, there will just be the two of you at the kiosk. Alternatively, you can both design your own car, in which case you would each have your own kiosk.