Ultegra is a solid product in my experience.
Came stock on the bike so just a maintenance purchase but really it's Shimano Ultegra, works fantastic with Di2. Original parts lasted a long time so no disappointments there. Smooth quiet and reliable.
Shimano 6800 for Shimano 6800 so worked great!
Overnite chain ring Ultegra
Bought a smaller ring for hill climbing on my CX bike. Easy to switch out rings when the season changes from long gravel rides to CX races.
What can I really say! It's Shimano, fits my cranks, and was a good price.
quick delivery. When my mechanic ordered the wrong one, they gave me credit for one I had to return with no restock fee!!