We use the Tripp trapp chair until they are about 3/4 and big enough to sit properly on a chair and reach the table. But Lennie does not need the baby seat part! My 17 month old doesn't even have it as he just climbs up and down himself.
(obviously that means he generally does it in the middle of dinner and runs off but
meh, that's just small kids for you!)
The most frustrating part of that 'clean' was that my kitchen looks like it has been destroyed after breakfast and I don't get child-free time to clear it all up again. It's survival of the fittest, especially in the holidays!!