During last sale I pulled trigger on silver pair of these brakes to replace SRAM Red 22 calipers on my SSE2. The Red calipers are a bitch to keep centered and very, vert susceptible to cable length. Not to mention plasticky parts on it. Enter the EE brakes and after riding for about 400 miles, I am fairly happy with the performance. But it's not without its shortfalls though.
For one, the calipers do have a flex. After installation, you can move the arms with little force - definitely not as stiff as Ultegra brakes which I have on other bike. Secondly, the little piece with "ee" logo thing is wobbly. You can pry it out pretty easily. I haven't understood the function of it as to why it needs to come out but you have it. It does have a pretty thick rubber gasket to seal but with just 2 rides in rain and dirt there was dust inside when I pulled the cover out.
Then there is the actual installation process - its definitely not as simple or straight forward compared to Shimano's or SRAM's. The cable needs to pass through tiny gaps on pivots into the tightening screw. That screw and square washer that presses against the cable are really flimsy.
With all that said, these things are a thing of beauty. Really love the complicated mechanical look of them. They also undercut Red calipers by around 50 grams. Rode the bike to my LBS and main mechanic was impressed at the machining and looks of it.
That's the thing - when I opened the box I was surprised how good they look. Absolutely no signs of it being fake. Came with all the documentation, washers, screws etc in proper packaging for each. In fact I am still not sure what the real thing does better. May be they are less flexy? Anyhoo, I still feel they are a little pricey for being fakes and aren't better than Ultegra brakes. The Ultegra R8000 caliper (pair) can be had for $65 brand new from eBay and have absolutely no flex.
Compared to SRAM Red, they definitely stay centered and look sexy. Oh and unlike SRAM, they also don't need silly 13mm wrench.
Too early to tell how the moving parts hold though. I shall report again after 2k miles. For now, if anyone is interested, buy them for novelty or to save a few grams but not for outright performance (especially if you are in Shimano land).