The sprung seats are typically Teutonic in their firmness and are part of the order, they are not standard so if you did not specify then you would not have got them. We have 2 single Duvalay Freshtec (NOT memory foam) toppers and this provides a great support. I had hoped that they would have kept the earlier style with a curved front edge rather than the piped edge right angle which always seems to get the tendons behind my knees. Having said that, these days we leave the beds made up all the time from journey start on the 410 so bit of a moot point. The sprung seats a fair bit heavier than the foam and I do think they could have fitted a couple of webbing handles to make handling a bit easier.