I haven't had to convert to a pear (yet...) But I do really like my apple. DD is 15 months and we're still happy with it.
It's plenty big enough, with bigger seat than lots of other pushchairs. The carry cot was big too- our health visitor commented on how deep it was.
It's easy to use, very solid and stable. I like being able to choose which way the seat faces, and there's a good range of handle bar heights. Being able to use it with the maxi cosi seat was incredibly useful too. And it has a reasonable range of recline options with the seat.
The front wheel can be locked in position, which makes it good in snow and on sand.
We've used it a bit off road and it has been good. This is the jogged version.
It is heavy, but I haven't noticed that when pushing only when lifting it into the boot.
I should say we don't use much public transport, but my MIL has used it on the bus without problems.
Extras are expensive, but you can get generic things which fit, eg we have a £20 foot muff from John Lewis rather than the £80 iCandy one!