We have rented this twice. I love the homey feel of it. It's not a cookie cutter "up and down" duplex like all over the island. Just about everything you need is there. It is nicer than the pictures as Dave has made quite a few updates since those were taken. It is private and the off street parking in front of the garage - if your car isn't too long - is great. There really isn't room to park in the garage. We like the garage for bikes and stuff. Loved the bikes - one has a baby seat. Being at the north end of the board walk it made a nice bike ride down to the other end and back and we like to bike the "Gardens" area, too.
The spiral stairs to the master suite are charming but I imagine they would be difficult if you were really large or handicapped at all. Only the private master bedroom, landing (that is where the kitchen picture was taken from), master bath (shower - no tub), and assess to the furnished sun deck are up there on the third floor. I might not recommend the spiral stairs for people with little toddlers as the top of the stairs would be hard to baracade.
The rest of the house is on the second floor, the ground floor being only garage and stairs and a very small appartment in the back which was empty when we were there.
The kids bedroom is off the center hall next to the bath and the third bedroom is off the living room in the back of the house. We didn't have children there but it has lots of space and places for them to play and there are even toys, games, kids videos,books and beach things.
There are outside stairs from the top floor deck down to the living room back door and on down to the charming little brick paved back yard, which makes it easier to get suitcases to the third floor than trying to navigate the spiral stairs with them. There is also a tiny deck, no stairs, off the kitchen in the front of the house - you can see the door in the kitchen picture. The kitchen is nice and well supplied. We love the place and the landlord is great.