I did it two years ago on fixed and it was fun.

There were a few lowpoints though:

- being the only fixed bike in a group of geared riders. Nasty on the descents, but fun dropping them all on the ascents and hearing them frantically clicking through their gears behind you
- the arse pain
- nearly passing out after about 60 miles whilst having a wee due to not having managed to eat dinner
- arriving at the beach in Dunwich in the pissing rain to find no spare seats in the cafe
- hearing rain drops plop into my coffee and turn my egg sandwhich even soggier
- the extra 8 miles after the cafe to my mate's house were the hardest I've ever done

I'm totally up for it again this year though.