These are definitely the best tires I've ever used on my gravel bike. In 40mm size, they are extremely easy to mount tubeless with a JoeBlow pump. No struggle, no fighting, they seat immediately. The traction on mixed surfaces is incredible. I've taken them on wet single track where no gravel bike has any business being, and they gripped like a mountain bike tire. On packed dirt and gravel they are very cushy and smooth. Conti has another winner with the Terra Trail.
The Velocita is a great choice for light gravel and road use. It was easy to set up tubeless and relatively worry free. I did pick up a piece of glass that got some sealant seepage (Stans), but it sealed quickly and I only had to add a bit of air.
If you are looking for a relatively light, worry free and fast rolling tire this is a good choice. Downside, it does wear pretty quick. I got about 3000 miles out of the rear (front will likely get another 1000 miles).
I ran these for about 1K miles in size 38mm in a variety of conditions in the PNW, primarily Forest Service gravel and dirt roads of varying quality, plus some local dirt and root singletrack. I used them tubeless with Stan's sealant. While they provide good traction in nearly all conditions, I found the sidewalls to be pretty fragile. I had to retire them after the rear tire would no longer reliably hold air pressure after suffering many cuts that the Stan's sealant could not effectively seal. I tried gluing the worst of the cuts, but that did not help much.
If you are riding on primarily loose gravel and dirt doubletrack without rough granite or sharp shale, these may work well.
These tires are great for gravel roads, single track, and old forest roads! Tubeless, minimal air loss, and very comfortable on rough sections.