it was a while ago, but i think it was a bit of a pain because of all the bits and pieces that come with it. Carseat adaptors, Pip convertor thingy etc. You have to remeber to take everything with you and there is not really anywhere to store them on the buggy utself.
I remember having an issue with the raincovers. They were really tight and had to stretch around the whole seat.One was slightly smaller than the other, so you had keep them separate or label them to know which one goes where. My DS was approx 1yr and a half and found the seat and the raincover really uncomfortable. His head barely fit in the hood, and when this was folded back it was just as uncomfortable.
The pushchair itself is v heavy. A lot of the options require the heavier child to sit at the front,and this made it difficult to mount pavements and steer. it also felt as though there was a lot of pressure on the handle bar.
I also recall that the shopping basket became impossible to use or access once both kids are seated.
It was just a lot of these niggly things that made it difficult to use really.
If you're going to try it out, i suggest that you try it with raincovers, hoods etc, up and down pavements or kerbs and see how you get on.