We use this one on my wife's bike. It's lighter and cheaper than Tubus, and works with its own line of quick release rack-top trunk accessories.
We are currently cycling around the world and haven't had a problem with this rack after 11 months. I will say, the welding workmanship on the Racktime is far inferior to Tubus, which is a bit disappointing despite apparently not affecting the actual strength.
https://www.racktime.com/en/racktime...ightit-20-tour