Bike Setup: Scott Addict, Shimano, conventional road setup.
Summary: This is kinda moot since the ES series rim was discontinued in 2007, except that the newer SL Premiums appear to have many of the same design characteristics. I purchased these as upgrades to Ksyrium Elites that came on my Scott Addict. They look great, but suffered from two reliability issues - paint and fatigue life. First, the red hub started peeling from the hub. I was told this was caused by solvents, but I use the same cycling-specific cleaners/lubes on the rest of my bike and this is the only part that had issues. Strikes me as more of a defect. The second, and bigger issue was that the rim failed after probably less than two years of use. A spoke broke unexpectedly, and was unrepairable due to a long crack at the spoke eyelet. I realize there is a tradeoff between light weight and durability, and that aluminum parts don't last forever, but I've not had these issues with other rims and wheelsets in the past.
Strengths: Good looks - red hub, red spoke as accent.
Weaknesses: Plagued with long-term reliability issues. Best kept for race day, not daily training.