I have just the agile - cant adjust the handle height on it as far as I can see.... But it is excellent and I love it. Fits in my small boot and is great on safety - that's why we bought it before our DS was born. Had him in it from a couple of days old.
I can unfold and fold it with one hand
I went and played with one at a baby shop before we bought it. I was instantly won over.
The only thing that bugs me with it are the wheels. They are softish. it makes it a nice smooth ride on hard surfaces (shopping centres, in the city) but I have lots of gum trees around my area... I'm constantly knocking gum nuts out of the tyres.