Which went surprisingly well, we had a lot of comments but they were all about how cool the buggy was, rather than DS1 being too big for it! I think it actually "looks" better than him being squished in a double, people didn't seem to realise he was bigger :)
Word of warning, if you need to fold it down, bring a screwdriver as the buggypod clips get in the way! It is also wider than my double was, so shopping was not a brilliant experience! But waaaaaay better than it would have been had DS1 been walking :)