I recommand you to check out CruiseReviews.com
to read some cruise reviews from the Norwegian Sun.
You can also click HERE
to search for "penthouse suite" in CruiseReviews.com, using Google, but make sure you read the newest reviews.
If you booked using a brochure, there is a lot of pictures from these suites on the internet.
If you want some links with photos, please tell.
Hope this helps a little bit.