It's smooth enough -- I lose count of what gear it's in. So I've got the gear displayed on FAP now. (BTW I believe this app works on 406s -- it's PSA specific.)
You can see it changing down as you slow down.
Had a quick blast in sport mode round the ringroad and that's much keener to change down.
The main nuissance is the delay between applying some revs and accelerating. It seems to be impossible to get out of a junction in a hurry. I guess you have to use your left foot to hold it on the brake while putting some revs on ready.
Anyway: on to the next problems... juddering. Both when accelerating and when being pushed, e.g., down hill. Seems to be worse if not in a straight line. Noticed pulsing whir on corner at low speed.
Current hypothesis:
* not an out of balance wheel because it's not at specific resonant speeds and because it's not particularly noticeable through the steering wheel
* not a wheel bearing because it happens in a straight line as well as corners
* not the torque converter lockup clutch because it happens at all speeds and in all gears
* driveshafts