Small update - these pics are actually from around December 2014, taken in very exposed bathroom light (with some shadows also I suppose) and I don't have any newer ones yet, so I'll put these up for now.
December 2014 (13 months on finasteride)
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I've not experienced much more growth since then (I think) so I'd say I'm about solidly-maintaining what I have now. The bottom pics are a bit shadowy but I suppose that's how it looks to other people most of the time, in any sort of flattering light.
it still feels like a bit of a mess whenever it grows out but, by and large, I no longer get any mentions about thinning hair, in fact quite the opposite. Two people, who I hadn't seen in a year, said recently that my hair is 'thickening' and couldn't work it out. That was pretty sweet!