Geoff,
Can not argue that they look somehwat flimsy, especially when the panels have been removed for maintenance. Looks rather like a small child's climbing frame with an engine hanging in the middle of it actually.
That said I have a few hours in both the 22's and 44's and can say that once in them and flying you really do not notice the size at all. If flown within their limits they are a lot of fun and very maneuverable.
As to height well it is tight I grant you but size laterally is more of a problem that vertically when it comes to the occupants. Many a "larger" passenger has hung over the collective for me but having taught a certain England cricketer to fly who was 6'5" tall I can say it was no problem at all.
Every one loves the 47 though :-)