I stayed in the Penthouse Apartment for a one night stay to meet up with friends. The apartment is well-laid out - perfect for a single-traveller or a couple. The location is right in the heart of the historic town centre, so all the recommended sights of Whitby are within walking distance to you. The train station is a 5-10 minute walk away across the swing bridge, so it's an ideal location if you're travelling via that method.
The chatter from the pub on the corner across from the apartments can reach up to the penthouse, particularly after closing time. I stayed on a Saturday night in August with decent weather, so the town was busy that night and I would imagine that it would be a lot quieter during the week or out-of-season. Overall though, it wasn't too bad and I still managed to get to sleep - the bed was comfortable too, which helped!
I would definitely recommend staying here. The check-in & out process is straightforward, with detailed communication from the proprietors. The apartment is smart & modern, with a decent sized shower and kitchen facilities if you wanted to eat in. I would look to stay here again.