I have had a few differnt highchair styles and by far this is my favourite.
My sister-in-law had this design for my nephews and as it converts to a table and chair they are still using it - their youngest is 7 years old now which was unfortunate for me as it meant I had to go and buy my own.
I don't regret this for one moment though as it fits exactly what we needed. It is flexible - it can be a highchair with tray table. A highchair without a tray table (which fits neatly under our table), a low chair with the added benefit of a table as well. On top of that the seat can alsorecline slightly too.
It isn't the easiest to clean but I have it to be better than others and worse than a couple.
The biggest problem I have with it is that my youngest is a climber so at 13 months she can scramble up into her highchair all by herself.