What a wonderful improvement over the 03!!! Better stopping power, better modulation, and quiet. Bedded without much fuss -- just careful at the end of a stop for a little while. And, did I mention, no more squealing?
This pad replaced the L03A pads, which replaced the L02A pads. Shimano states that this is a further improvement. Fit wise, it is. Time will tell if stopping power or wear is improved. For now, no issues with the new pads.