Differences in years (12c)

[Wilmslowboy]

I know it's been discussed before however my search skills have let me down.

What is the best year to buy ? value versus updates ...I'm strangely drawn to a 2012 car (but it has iris1 ...indented buttons directly below the screen....is this correct?)

Is there anything else I should be checking ?

Cheers

[Wilmslowboy]

Hmmm

Only really interested in those things that make it go, stop and look
As frustrating as iris 1 is, I think I can live with poor sat nav etc