I did about 18 miles total on this bike yesterday and don't feel it at all today. The posture and the seat are great for short rides. On the other hand it's a noticeably longer workout, there was about a 2mph penalty vs my usual commuter, and I'm not quick to begin with. The time is somewhat made up by the get-on-and-go convenience of it. I made a couple of fit adjustments before riding home and was much happier.

I like the seat. It's sort of a medium size for its type. It's got a lot of padding but it's not a giant cruiser seat, its foam is firm, and not memory or gel. The nose on this example is "girl" length, I don't know if the diamond version has a longer saddle.

I also realized something about the posture and comfort. It's not profound but it was outside my experience. With curly-handlebar or suspension-fork bikes we tend to go on a bit about the comfort of the front end, but when you are sitting bolt upright, the handlebars get almost no load and the grips and fork have little bearing on your comfort. The seat and pedals get more important, though!

I still want lower gears, though. My longest evening climb was quite a slog and would have been a problem if my heart meds weren't in full swing, and the steepest part of my morning commute made me get off and walk.