Really nice staff review of Clash of Arms: Cavalry over at RPGNow. Here's a taste but I recommend you take a gander at the whole thing here:
Overall I found this to be a very interesting pdf. There's a lot of useful material, the mechanics and the flavor of the material support each other very well, and there's a lot more to this product than simply a core class. The only drawback remains that the class is extremely focused, but that shouldn't deter from using this material where it will be most appropriate. A nifty little pdf with some novel material that should complement many fantasy games.