I have had a good experience with Stronglight chainrings on my 7800 group (7400 crankset). I had some issues getting the chain from the small ring up to the big ring. Previously I had been using the original 7400 chainrings, then a Vuelta big ring, then a 7800 inner ring, with not a whole lot of shifting improvement. Then I took a shot on the Stronglight rings and it was fantastic. I had been looking specifically for chainrings that would match the polished silver of the 7400 crank, so I was pretty happy to have both good shifts and looks.