Found one, in my view very poor feature of new model and having owned multiple Honda cars this is the first significant complaint. I always have a full size spare in my cars - would not even buy a car if it could not carry one. With my new Jazz I got the full size wheel and tyre as the car is shod with for a good price as part of the deal. When picked up the car still had the spare wheel well filled with the tool tray/storage pockets moulding. When this removed and the spare fitted in its place the boot floor put back down into position some consideration of fitting my 'boot caddy' for carrying the dog was made. Even with that fitted with dog in place (only a 23kg Spaniel) it was apparent through the boot caddy floor that the underfloor was distorting. Removed the boot caddy and it was very obvious that minimal loads on the boot floor lead to serious distortion - so much that floor collapse could easily happen with a not very large load which did not spread to the underlying structure. Even a suitcase of the right/wrong size in the boot centre could cause collapse. I think when a 'space saver' is supplied there may be a tool holder moulding also supplied, this may provide some support. I am in discussion with Honda at the moment on this subject, will be taking the car back to dealer at Honda's request to discuss for them to also report back. In the meantime, have fitted 6mm ply with two straps that rest on the spare to provide adequate support for the boot floor.