In terms of concept, the Fenderstep is a sensible product. Unfortunately, the plastic surface becomes soft and dissolves after just 2 years. The price is far too high for that.
I have to order the THIRD one on 10 years. They are very practical but do not last long. Due to UV they become soft, sticky and deflate after a few years' use. Let the the Danes know about it, let them improve the material quality.