Northants is especially hard on speeding I think. I got done driving through Roade (a 30 zone) for doing 35 on xmas eve 2005. As I was within 5mph of the limit I got the option to attend a speed awareness course OR go to court. As it was the 3rd time in 8 years I'd been caught, I went on the course... Quite enlightening actually - in built up areas I'm probably far more careful now.
I've always just paid up before now. Mind you, the first time was in Sth Wales - rather than a fixed penalty they took it to court...and the court fined me only 40 quid and charged the costs to the police...
2nd time was in Leighton Buzzard and I just paid the fixed penalty.
Its ironic that the Camaro is easier to drive at 30 through the villages round here than my old Honda Civic is, thanks to the cruise control...
I took my Dad out in the Camaro for the 1st time the other week - we were on an empty stretch of straight road and the speedo mysteriously climbed to 135mph before I backed off...
I blame the euro km/h speedo - takes longer to read the mph speed...
Oh, and my Dad totally loved the car (everyone seems to).