I have now had my C5 Mk3 for nearly 3 months, and I am very pleased with it.
Down side-I got used to the position of the handbrake and the steel springs , no Hydro bits, but you get used to it very quickly, because its a Saloon and not a Hatch the boot is a bit smaller.
Up side- There are good bits like the extra front lights at night when you turn the steering wheel, they light up the side of the road, the rear mirror goes dark when someone is behind you with there lights on(You don't have to move the mirror), Satnav is very good, the gearbox is very good, and best of all is the MPG, I picked up a caravan 70 miles from home and got 32mpg+, and on a mid to long run I got 55-70 mpg, 70 down to 60 when I hit town. It looks good too, and the best part was it was over for £9 grand for a car that was 3.5 years old with only 20,000miles(ex Motability car) on the clock with a major service just done.