I used to ahve a limiter on a lorry I drove.. a big old dodge that had a double clutch and limited to 55mph (never knew why) and it was as frustrating as hell .... long hill out of barrow was a great place to free wheel to 70-80
Nowerdays in my car I stick to speed limits in towns and the like.
On moterways I do 80 minimum and rare over 90.. genrally 80
When traffic comes close to a moterway polce car they all slow down to 70 and it causes problems... i try to shoot past at 80+ .. the police dont give me a second look but you know all the other drivers are thinking... whys the copper not chasing him..
Police when cruising do 70 ..99% of drivers either sit behind or pass at 72 MPH until out of sight then speed up
Oh and at 80 on the moterways theres always more cars pass me than me pass others.