Even better than the Priori XP ? The Tobi has some mechanism to automatically move the straps out of the way to ease insertion and subsequent restraint of the child, and also has some 'belt tension is correct' type of indicator.
(Looky \link{http://www.maxi-cosi.nl/html/uk/index.html\here} - click seats / Tobi. Foul olours though).
Sounds quite clever and useful IMHO. Just wondered if anyone had tried one yet ?