Im not sure if I would say it's a must have but it does however help to create a more open feeling which can greatly increase your experience in any vehicle with it.
Ah you don't necessarily need to see the gutters, MKZs are hidden under the glass...This may be a dumb question, but i do not see the gutters.....meaning is this a panoramic moon roof, or just a panoramic roof? I would love it to be the latter.
Are you speaking from experience? From a vehicle you owned once before with this feature?once you have it. its something you really enjoy and dont want to live without