Friday I had the pleasure of finding a note from the mailman that my upgrade kit had come in (great way to start a weekend imo). Here is what I have to say about it so far: What am I reviewing?: this Shipping/What's in the box: USPS was kind and shipped quickly and safely. The damper comes pre-assembled to the brackets and with the red (looser) spring installed. It is easier to swap the spring before installation but I did manage to swap the springs after (had to test both you know). Spare parts include a stiffer blue spring, a spare rubber for the damper as well as a couple different washers for the oil reservoir. If you're in the US you got some extra oil for the damper as well. Installation: Since I don't have tiny hands (or a tiny-handed helper around) it was a little difficult to get the top bracket assembled. I am only joking though, nothing can be done about it just need to have some patience is all. 20 minutes of fiddling (and looking for a lost washer and nut) I had my CSP's upgraded. I got away with keeping my pedals mounted on my obutto pedal plate; just caused a bit of extra fuss. Impressions/Feelings: Wow. I had no idea how much I needed this thing. In case you're reading this and don't know what a hydraulic brake damper does I'll explain. First it makes the pedal stiffer and second it makes the pedal more responsive and way easier to modulate due to the back pressure. It wants to return to its uncompressed position more strongly, but not in the way a tighter spring would feel. In other words it responds more like a real world brake pedal. Not much else to say beside thanks, Dave!