Hello Benno
The bike is great , before buying it I had three options to travel to work, My mountain bike (heavy, big tyres, suspension) all of which made using it a grind, the suspension did at least soak up the bumps, my fixed wheel bike which was O.K but the hills I encounter on my commute were right on the limit of what I could achieve on fixed wheel and the car the less said about that the better
I was a bit worried about only having 8 gears but have found this to be ideal just the right amount of gears and spacing between them to tackle the up hills and yet give a good turn of speed down hill. Brakes are very good and the frame very stiff and quick steering in traffic.
You are right a little harsh on the bumps but you can't really get away with that without loosing the advantages the bike has. The only things I have done is fitted a cheap rear mud guard to keep the wet off my backside and fitted a set of lights.
For the price I don't think I could have done any better with regards to a fast commuter the only things near it cost at least twice as much !!. I don't really think that there is any difference between the 26X1.5 wheels/tyres or 700c but at least if you wished to fit some fairly wide tyres to make the ride a little less harsh you have that option with the 26 inch wheels.
PS Sorry it took me so long to get back to you.