I've sailed over 150 days with Holland America and well over half have been in the Deluxe Veranda Suites - here is a link
that will take you to HAL's website for a full description, the size of the Deluxe Veranda Suites and the amenities you receive. I can assure you an experience well worth the money. I just returned from a cruise around Cape Horn (Valparaiso to Rio) on the Rotterdam in a Deluxe Veranda Suite. We were traveling with another couple who had the adjacent suite. The cabin steward unlocked the partition between the verandas which then gave us an immense space to have cocktails. You will find it a very civilized way to enjoy your cruise - there is also something very special about a pre-dinner cocktail on your own veranda while watching the sun set.
And speaking of cocktails, HAL will allow you to purchase bottles of your favorite liquor for consuption in the privacy of your own suite/veranda - I posted the list and pricing on this board some time back. That was what we did rather than attempt to sneak liquor aboard like boarding school students trying to sneak liquor or beer into the dormitory. In addition, you can openly bring wine aboard. There is no corkage if consumed in ensuite.