I have a pano sunroof, do I like it? yes. Would I order it new from the factory, mmmm probably not, as I could think of better ways to spend / save the £1K cost.
I like the fact it brings much more light into the cabin all year round, I really like on a sunny days opening it, but as others have said it's not full a full length sunroof, not even close. Touch wood, no problems yet, touch wood again!
I bought my car 2nd hand (3 years old), I wanted a GTI PP, at the time mine popped up with the right spec / colour / mileage etc, 2 miles away as approved used from local VW dealer, minus the PP pack but with sunroof.
Have to say, as much as I like the sunroof, I would still rather have the PP pack over the sunroof personally.