Hi,
This is supposedly suitable from 9 months and my ds will be 18 months when number 2 is born. It doesn't have a 5 point harness but seems fairly adjustable in terms of getting a good fit with adult seatbelt etc. Reclines too so ds might be able to sleep a bit on lone journeys.
I really don't want to buy another seat like the one we've got (britax ecplise) and want to move ds into the next stage car seat so that buba can have his rear/front facing one!!
So do you think 18 months is too young for the Indy plus with adult belt??
(should add that ds is a tall boy but not at all going through a chubby phase..I expect he'll be very skinny when he gets walking!!)