I have it. It is well-designed and made, and it is relatively easy to install. Their website says it has a tilt angle range of -5° to +17.5°. I have mine at an upward angle, but I do not know exactly what.
I have it. Adds a bit of stack but feels quite robust. No slipping and I see no chance of it slipping unless a screw head were to sheer. I'm pretty sure TriRig states the tilt range but I'd guess mine is somewhere around 15 degrees.
The other responses here are correct. The tilt kit provides a range of tilt to Alpha X of -5 to +17.5 degrees. At its lowest (with the included Slammed Setup parts), it only adds 2mm of stack, so pretty negligible. Otherwise in standard configuration it adds about 5mm compared to the standard Clamps.
We have never heard a single report of tilt slip. It’s very solid and robust. -- TriRig.com
It's a tad tricky to install initially but easy to adjust after that. Yeah, it's solid. In the event of a huge bump or pothole, something else on the bike will probably break before the tilt mechanism fails.
Here are a few quick pictures of mine. Lighting and perspective is not great, because the bike is on my trainer, in the basement, with little room around it. But, this should show the key parts up close...