Get the Ikea one!! I have cleaned literally hundreds of highchairs over the years (worked in nurseries) and the fancy wooden or padded material ones are a pain to clean. The ikea one is soooo easy a few wipes with a cloth or wet wipe and it's done.
No idea why people buy fancy ones that tilt back ...why would you need that ? if they fall asleep lift them out!
The tilt is for babies that can't fully support themselves.