I'm a bit of a cycling bag junkie, with several brands and sizes of Carradice, Acorn, Louis Garneau, Topeak, Ortlieb and others. I used a Carradice Barley almost exclusively for commuting for a number of years, but have started using racktop bags more frequently in recent years. However, I have a Carradice Bagman rack on several bikes and use their Barley, Pendle or Zipped Roll bags on those bikes.
The Revelate bags intrigue me but it seems like it might be hard to swing your leg over the bag when mounting your bike, and that the long extension could also affect handling. Do you notice any effect on handling? One reason why I like the Carradice bags is that they center your cargo weight close to the saddle and the effect on handling is imperceptible.