This is the third Tubus Fly rack that I've purchased for my bikes. Compared to other racks, this one minimizes material/weight. but still holds significant loads. Installation of the rack is not intuitive ... but once installed properly, it remains rigidly attached.
I love this rack. It even fits on my gravel bike with disc brakes (my brake is mounted on the chain stay instead of the seat stay). I love the way it looks and the fact that such a light rack can have such a heavy weight capacity. I'd buy it again in a heartbeat. The aluminum rod takes a little more effort to correctly bend than traditional setups, but it looks nice when it's done. My Ortlieb panniers fit right onto the rack without any adjustment necessary.
It took a bit of work to make it fit (516 spacers each side, and had to order the additional brackets to mount to the seatstays), but now it's awesome. I love how low profile and minimal the design is. It looks great on my bike and has been holding my bag to and from work for a couple of weeks now with no issues. The thing is solid!
This is a bare bones rack for those who want to keep it light and looking clean. The rack is very well made and attaches very solidly. The price point is elevated but here is a case where you are definitely getting a premium product. Make sure your mounting points will line up. This is not a very flexible design on the bottom. The upper does give you options, though.