Ultegra is basically my favorite in the Shimano group set lineup it basically checks all the boxes, quality, durability and affordability. Also, I agree with the previous reviewer George Gilliland. I am a heavier rider, as 160 is basically a fly weight. I typically power up to 300w plus on Florida climbs and run chains easily to 2000 miles plus before changing them on these cassettes. Now, I always quickly lube and clean my chains before rides with Pro Link Gold ( I have 4 road runners in my fleet), and I always shift without grinding, as well as avoiding most cross chaining like COVID 19. With that said I am getting every bit of 7000 miles on these cassettes. Finally, I have a small parts department in my bedroom closet that keeps my fleet ready looking professionally maintained and to go KOM when I'm in the mood. So, yeah I decided to stock up on two of these babies, though I still have one in the box in my home inventory, The Price! The MOVATIK price was outstanding for these spanking new genuine Shimano Ultegra cassettes and was the best on the web. I also picked up four Conti GP 5000s at a super price as well, Oh that fresh rubber smell of those newly handmade tires from the German fatherland makes me recall the beautiful shimmering Danube and my time there with all the fair maidens of the Rhineland. Thanks MOTAVIK I'll be back....