I've had 6 highchairs now.
We had a cube high chair ,which was lovely when it was new.It took up lots of space.The tray came off to clean ,which was something I did like,and this also meant it was suitable as my child got older to sit in at the table with the family.It had a plastic covered padded seat which was easy to wipe clean.No corners or edges where food could get that were difficult to clean ,so another plus.Once my toddler was eating with a fork though they managed to stick the fork in the plastic cover of the padded seat,exposing the foam stuffing and I just couldn't keep it clean.
Had a fold up Bruin one.Metal bar frame.Seat was made of a stiff board,covered in plastic/pvc type material,which split easily and again couldn't keep it clean.It was cheap,I got what I paid for.
I did like the Chicco Happy Snack.It had a nice bit padded seat.Nice big removable tray.Sturdy base.Folds up.The problem we had with this one was the food collecting in the corners of the seat pad,which was a pain to get properly clean.The plastic seat pad could be removed for cleaning,but again this split.
We bought another Bruin one,suitable from birth,fairly expensive.Padded PVC seat again,removable for cleaning.Adjustable height,which is something we never used.Lie back,we didn't use either.Big removable tray,with two layers of tray was useful cos when they've made a mess with their dinner you can give them the pudding on a clean tray.We had trouble with the height of the safety harness on this one.Lots of nooks and crannies to collect grime and the seat split,again.
My most durable highchair is a traditional style wooden highchair.You add your own insert for a younger baby,take it in and out for cleaning.It has D rings for a harness to be fitted,we have a spare set for one to be in the wash one to use.The main part of the chair is easy to clean,the sides are open so you don't have corners for food to gather.Ours has been in constant use for four years now.We bought a new seat pad for my son when he inherited from his sister.If I could fault it,it doesn't have a big enough tray.
For me,safety first,comfy for baby,then easy to clean,and durable.I like a big tray,they're just babies,they're learning,they're messy.Looks nice,comes into it,but practical first.