My DD is 22 months and is fighting me about going in her (ludicrously expensive, my d sister chose it) Phil and Teds high chair. She wants to be on a chair, but is tiny so it just doesnt work. have been thinking about getting a tripp trapp, but wanted to know if they do really last for years (my step mother tells me that DD will hate it after a year) or if I should just buy a booster seat and stick it on a chair. any views?