A friend of mine has one, few have had them in the past.
One mate had a 172 Cup that he stuffed into a hedge going down some B roads round my way (Gower Peninsula) and although they do handle very well and have shit loads of power, the Cup versions have very little safety features (Less weight - Only difference with Cup and non-Cup) which made the car very lairy to drive. Dont think it had traction, abs etc...
However my other mate has a 172 non-cup with air con, traction...Spare wheel
etc... and she loves it!
Very quick cars, but ultimately French so wings are plastic, build quality isnt amazing and pretty much identical to the 1.2 but with some styling add-ons and a whacking great 2.0 up front.
I'd have one as a track car, but I dont think I'd have one as a daily. For the £4000+ and insurance group you could buy a much nicer, better quality motor. e.g. Integra Type R, Civic Type R, S14, Skyline, Glanza, BMW etc...