I'm really happy with this booster seat - we bought this for our 18 month old as he loves to sit at the dining table and eat with us. The booster seat straps onto the dining chair, but there are so straps to strap the baby into the booster, so you do have to watch them very closely when they get wiggly and try to get out of the seat! I'm very happy with this product overall.
Enables baby to sit at dining table with the rest of the family for meals, sinple design, easy to put together, 2 height settings, easy to clean.
Cannot strap baby into this chair

I loved the look of this, especially being able to turn it over when your toddler got a little taller. However we only used it once or twice as you can not strap the toddler in so it isn't safe. And we found if we didn't keep a hand on he would have tipped it over and fallen out. Not a relaxing way to eat dinner.
It has the two heights depending on which side you put down (one half is deeper than the other)
You can not strap your toddler in so it is not at all secure