Sounds very good. I did my first over 10 miles last Oct. 58 miles to Brighton but did take about 6 hours including numerous checks of map, drinks of water and a stop at a nice pub about 35 miles in for a pint of ale and a fish and chip dinner.
I too made the most of yesterday's lovely weather and clocked up 58 miles, my first half-century since riding the London to Brighton on my mountainbike many many years ago.
I did stop for lunch briefly but the computer said 3'20", ave 16.9, which I thought was not too bad considering I've only had my road bike for a total of (now) 280 miles. Hopefully this will contribute to shifting the spare tyre (foldable of course ) that I seem to have round my middle!