Pricey and about 18 months too-late. There’s several folks designing DIY traction loss rigs with Chinese servo motors and controllers. I’ve got a preliminary design myself, and costs should be under $1000. The availability of new motor controllers that interface with common Simulator motion software packages makes this kind of project fairly easy, on the level of the DIY D-box setups.
OSW + DIY motion setups are changing this whole world, and the commercial vendors are either too-late or haven’t gotten the message yet. The days of $10,000+ motion rigs are pretty much over.
I don't even know of a single game that outputs understeer telemetry which means they are guessing with calculations based on sway and or yaw.
Many of our Sims have dedicated traction loss telemetry. I use Simtools with my DIY D-Box setup, and you can see exactly what telemetry each Sim outputs. It's surprisingly comprehensive. Off the top of my head, I believe Project Cars 2, AC, and iRacing all have traction loss output (not just yaw, but a channel the specifically shows loss of rear traction). FYI. See, the tuning screen for PC2 in Simtools. Note the "Extra1" channel.
Because of this, the software side of adding a TL setup to your rig is very easy. If you use a controller like Thano's 7-channel controller (which I do), you can add TL and seat-belt tensioners to a D-box style setup via the same controller and software.
Yes, Barry was quite impressed with the effect it provides. He intimated that he wants to mount his main rig on it though i don't know how that would work with his DBox. I found it extremely intriguing, maybe even moreso than the DBox/SFX100 rig movers. To feel under and oversteer, in my mind, not only adds to immersion but can be pretty useful from a practical standpoint where it can help in recovery of a slide.