These benches are the perfect accessory to spa showers. A built in bench is a commitment and gives a shower too many extra corners to attract mildew. By putting in a stand alone bench, my clients are given the functionality of a bench and shelf with the ability to keep it clean and maintain it easily.
Solid surface is the best material I can think of for giving clients a clean, easy to maintain surface. It is hospital grade and will not attract mildew. It is softer looking than stainless steel and comes in dozens of different colors.
This particular bench has a shelf to accommodate baskets and short bottles.