We took the Expedition from Ollantaytambo to Aguas Calientes and the Vistadome for the way back. The trip was amazing compared to the last time I went to Machu Picchu 7 years ago (local train with lots of people standing, bags and chickens), certainly a different experience. The difference between Exp and Vis are the seats, the snacks (ok in both cases) and the show (typical dances + fashion show on Vis). Definitively recommend it!
If you own or manage Vistadome, register now for free tools to enhance your listing, attract new reviews, and respond to reviewers.