Don't mean to offend anybody here but I really dislike Jane.
I work for a fairly large independent nursery retailer. We sell many brands but Jane is by far the most troublesome manufacturer to deal with.
The build quality is by comparison quite poor, we are constantly sending back our customer's prams back to Northern Ireland (to Johnston Prams, the UK distributor), who are frankly not interested in dealing with repairs.
To be fair though, we have seen far more problems with the Powertrack and Slalom models than the Carerra. I still think the build quality (for the money) is rubbish.
I hope I havn't upset anyone too much here.
Another thing to consider is the fitting of the Matrix car seat. It is much larger than most other group 0+ car seats and therefore does not fit well into all cars (in the seated position), the seat belts of many cars are not long enough to go around it, making it sit at a very awkward angle. If you do decide to go with it, get the retailer to fit the car seat into your car before you buy to make sure it fits.
I know that it is great on paper, but in reality the Jane is not quite as perfect as it seems.