I bought this travel system for my second child who is now 2 and a half months old. We now use the pushchair seat instead of the carrycot because she doesn't like being flat during the day. Both the carrycot and the seat look very comfy, particularly the seat. If we had to put the pushchair in the car more often I think we'd find the whole thing too bulky but I mainly walk with it. We haven't tried it in any sort of 'cross-country' situation so I'm not sure how it would do, possibly not as well as some other more tough pushchairs.
It is very easy to push, and I have had very little problems using the different functions, although using the wheels with the car seat can be difficult as it can sometimes be a struggle to take the car seat off again.
I'm not sure I would buy this pushchair again, but I like it and it suits our current needs. I will probably buy another pushchair/buggy when my daughter is a bit older.