*longevity of components (including wheels)
Only had it for a few months and haven’t worn anything out so hard to say. It’s for use on road (most of the time) and the components are decent Deore-ish level.
*gearing (and its overall suitability I note you found it low enough for your hill)
Granny ring and middle ring sizes 24 / 34 I think. There were times when a big ring would have been fun, but the bash was good on steps.
*flexibility of the structure of the bike for carrying awkward (not just child-shaped) loads
Good I’d say. There are lots of rings to attach bungees to as well as the rails. Just look at a photo of one.
*sizing – pic looks like it could be quite flexible on the saddle height front, but less so at the bars
Bike tested was an 18″ and was fine for me at 5’8″
*whether the supplied panniers are the only bags that can be attached to the frame and what their quality and suitability is like
The 2009 bags look bigger and better. The ones I had were good but too small. Also held on at the top by folded, flat plate hooks which can bend under more extreme load. They do come with rain covers. I also fixed a bread crate onto the shelf for bigger loads.
*how much more awkward storage is compared with a regular bike with rack and panniers (it’s longer, but I don’t have a feel for whether it’s much harder to live with at home)
Didn’t fit in my shed! Had to take the front wheel off to get in my 6 seater Vito van which you don’t have to do with regular bikes. Ideal if you’ve got a garage.
*what you think makes it a better alternative than other cargo bikes on the market (noting that the market is pretty limited)
Haven’t tried any others, but cost is good.
*what you think it could have done better
Disc brake on the back as well as front, just so that you just carry on type of spare pads. Better panniers. Other than that I loved it.