I bought one of these back in April, but I sprung for the Mocha Duo tone

It took me a few weeks to figure out the suspension seatpost... I didn't even realize I had one until recently. I noticed my seat had some sway in it, and thought maybe I had broken it. After messing around with it for a bit, I found the ring that adjusts the suspension (unbeknowst to me at the time), and locked it down and the seat didn't sway anymore. It was just a week or two ago that I found it it's actually a suspension seatpost

I also got the Quandrant... I purchased a Mars 3.0/Quadrant combo pack for 29.99. It's OK. It dimly lit up the road in the areas where the street lights were further apart (or the city had shut off every other one - to save energy I assume), but that's about it. I recently upgraded to a Dinotte 200L, which I was not impressed with initially... the light it casts barely anymore noticable than the Quadrant under the street lights... but when you get into the darker areas, it does a great job. I keep the Quadrant in my pannier just incase I need it.

Finally, I would encorage you to get a rack and trunk bag at the least. I also do not carry much to work, however I find the bag to be invaluable. The big thing is keeping all of your loose items with you. I put my badge, wallet, cellphone, keys, etc into a side zip pocket on my bag so that they don't fall out of my pockets on the way to/fom work. I also ordered a pair of Nashbar ATB panniers on sale, and just keep one installed on the left side. In it, I keep an Addias track jacket incase it gets cold or rains, pump, and the second pannier folded up incase I stop somewhere and need the extra storage.

My ride to work is only 2.5 miles, so I probably could do with out some of this stuff, but it sure makes for a nice ride.