It's a pushchair for my DD and my niece (both 7 1/2 months).
I know these seem completely different but it's because they just about fit in our mum's car. Just on folded size/shape the Powertwin is one up as it fits with the parcel shelf on. The BJCM needs to stand up with the parcel shelf off but then leaves more room for stuff in the boot.
The general plan is that I'll also find it useful in about 18 months when I plan to be having another DC so we did want at least one seat to be suitable from birth. From my sister playing with them in the shop, she reckons the back seat of the powertwin would be ok, or you can put a car seat on it. The BJCM is obviously fine from birth anyway.
We'll be using it for everything with the girls together, so shopping, walking in the park, a bit of walking in the woods (doesn't need to be serious hill walking) etc. So we want it to fit through doorways ok, be easy to manoeuvre, light and generally feel nice.
The reason we're getting it is because the girls seem uncomfortable in their current double as the backs are a funny shape, so we want it to be nice and comfy. My DD is very big so it needs to be nice and comfy for a big toddler if she stays this sort of size.
Any ideas/comments/suggestions/advice/thoughts/experience/general rambling gratefully received! [cgrin]
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Baby Jogger City Mini Double OR Jane Powertwin?
saoirse86 · 02/05/2011 19:48
I had a Jane Powertwin for my newborn and 3 year old.
The 3 year old's head didn't fit under the hood and her legs hung down by the front wheel, catching it :( As only the rear chair reclined fully flat, she was in front and the baby in back. Consequently, with the heavier child at the front, the whole wheelchair's centre of gravity is out of kilter and the buggy tipped over when ascending kerbs, inclines, steps, buses, anything. For a more petite woman or someone post- c section, the buggy WILL tip over completely. How this Spanish brand passes CE safety regs I will never know.
Lock the front wheel to possibly prevent this, I don't know. I doubt it. It may react differently with the smaller child in front, but I wasnt willing to wait!
The newborn recline seat at the rear is very good, the hood covers the whole space well.
The raincover is fab, with access windows, and covers entire buggy.
Shopping basket is fab too.
If you are buying secondhand, take some tools and open up the housing around the fork on the front wheel, it will likely be rusty or about to snap, they shear off quickly and again ... over goes the buggy! Online reviews will also back this up.
The air wheels are a nightmare to pump up, you need some kind of adaptor attachment for the pump that comes with it.
Nightmare to fold down and is huge, you'll need an estate or peoplemover whatever they're called type car.
As you can see, I dont recommend it!
The Jane TwinTwo has four wheels and is much more stable.
It's looks funky however and has great colourways. Ever wondered why you rarely see them on the streets and there's so many for sale on ebay? Because mum use them once, rollover occurs and they cant get rid of them quick enough I expect! They're downright dangerous. 
No doubt someone else will come along and say what a lot of nonsense they never had these problems, but if their factors were identical to mine then I logically can't see how that is. Just read other internet reviews.
Ultimately, if it fits your lifestyle, a side by side double is much better. I had the Out n about Nipper 360. It was perfect in every way.
There you go love, a liner, perfect solution! 
Guildfordnanny did you use the BJCM when your LO was a newborn? DO you just use the seat reclined fully or a soft carrycot? Or can you do either?
Yes I'll buy the liners!
accessorize I know there are lots of pros with the nipper and MB's but they won't even come close to fitting in our mum's boot so they're out just because of that. 
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