mammamia - we've bought my niece an Our Generation doll for Christmas (she was 5 in August). We bought it back from the US with us - it was a bargain, although a bit of a pain to pack - but I noticed a couple in TKMaxx today for £19.99, so might be worth a look in there if you do end up going for one.
I know my niece will like it, it's more what I would call a 'real' doll rather than a soft bodied/soft limbed-first baby doll. It's got solid limbs, but a soft body (albeit firmly soft, if that makes sense). I agree I'm not sure it would be appreciated by a child under 4/5 necessarily.
I've ordered some bits from AliExpress for her to go with it, I'm sure she's going to love playing with it. 