Well I owned the Smart Roadster (with boot and soft top), and I can tell you that the boot (trunk) is very limited to what it can hold, so this is an improvment, LOL!
I got rid of my Roadster after the warranty ran out (two years), as they are very bad at letting in rain water, from roof, front bulkhead, speakers in the doors, and door mirrors. Mine leaked from all of these locations and could stand the damp no longer, so sold it.
I have owned three Fortwos now (450, 451 and now 453), and never has such trouble as my Roadster. Pity, as it was great to drive.