How old was your LO when you started letting him/her sit on a booster at a restaurant? C will sit in a high chair during her meal, but is at that squirmy age where we either walk her around the restaurant after we order (if we're seated at a table), or let her sit in the booth next to us.

I guess I don't want to ruin a good thing we've got with the high chair once the food comes (I've had friends whose kids would refuse the high chair after being able to eat "at the table") and I'm not sure if she could handle a full meal at this age (she's 19 months).

Just a quick check to see when it worked for you guys!