Anyone had one or got one, standard or mapped?

What's it like day to day for reliability, mpg, performance, running costs and such? Been offered one for my Focus which is very tempting. It's a V-reg, 100k miles, silver with black heated leather, black wheels and rear lip removed. Has receipts and history with it and 6month or so T&T. I know my vag cars well having owned a remapped diesel 25th Anni Golf and remapped Golf GT TDi 150 previously.

Opinions?