Britax B-mobile 4 - does anyone have one?

[toomuchtooyoung]

Had my mind set that I was going to use a sling from birth and not bother with a pushchair, however, have since had a change of heart as I realised I was probably being quite selfish and grandparents wouldn't want to use a sling (all in their mid 70s) but would want to push their grandchild. And they've offered to pay.

So I've narrowed down the requirement for a pushchair from birth, the most important being weight, then size, and preferably with one handle and found the Britax B-mobile 4. www.britax-b-range.co.uk/B-Mobile.html

It looks like it will do everything required but just worried about the width of 62cm, seems quite large? Also are 3 or 4 wheelers better?

Can anybody enlighten me as to the pros and cons of this model?