Got this on sale and it worth every penny. With only three contacts points on a bike, having a high quality high performing bike pedal is essential. The lighter weight and improved wider platform allows easy spinning and great power transfer through the pedals. If these are on sale definitely buy them.
I like everything about this pedal except its tightness. Pros lightweight, smooth rotation, large platform, excellent energy transfer. Cons It is very difficult to kick out of these pedals. This may be more of an issue with new cleats. I have the pedals on the lightest setting and repeatedly work on clicking in and out. However, I really need to concentrate on a technique that works and plan ahead when I'm going to kick out, because of the stiffness. I've ridden about 300 miles on these pedals and the yellow SPD-SL cleats to date. I've lubed the contact areas on the pedals and pivot point, and have even worked the pivot action thousands of times using soft jawed vice grips. My next option is to try blue cleats because they have less rotation, to see if that helps with kick out. The most consistent kick out technique I have found is to firmly press the front of the cleat forward against the front of the pedal clasp prior to rotating the heal outward.
These pedals are solidly made, have a very positive engagement mechanism, and are easy to flip with your toe before re-engaging. I have thousands of trouble free miles on previous generation Ultegra pedals, and I see no reason why these should be anything less than super reliable. I have no issue with weight as I don't think pedals are where you want a superlight component. You want a rock solid pedal that you never worry about. Other nice things - they look great and you can ride your bike in tennis shoes for short distances without discomfort or fear of slipping off. Just remember not to bunny hop.