Hey guys, I am the one who made that YouTube video of my DD wheel with GT Sport. I really appreciate the attention this project has gotten!
Just to clear some things up about GIMX, there is full ffb support with any USB wheel, full degrees of rotation (set by driver on PC or by game on console if applicable), as well as support for multiple custom device inputs including using an axis to control a button (like for using an analogue handbrake). I am currently running my SimuCUBE + small MiGe DD wheel (using MMoS FFB driver), Fanatec pedals via USB, CSS SQ shifter and a custom Fanatec rim plug and play USB conversion I did for my direct drive wheel. That's another cool video, basically I can take any stock Fanatec rim out of the box (including the Xbox Hub) and connect it right to my DD motor, it connects both mechanically and electronically just like it would with a stock CSW base and works in game + fanaleds. So basically you can use whatever you want, even my button box works. Also, there is no lag (other than the lag that is naturally in GT Sport between the in hand wheel and the graphical wheel, this is only graphical and happens with any wheel on GT Sport) and the FFB feels correct. I do have to set the DOR within the driver when running GT Sport but I actually like this and the GIMX software tells you what the proper DOR is for the car your driving. It is actually nice because it can be adjusted while you are on track, just go to the FFB driver for you wheel (on the PC) and adjust the DOR, it will immediately be applied. You can also adjust the FFB intensity and whatever else is in the driver.
I believe this solution is superior to CronusMAX if you are running anything other than a logitech wheel or logitech emulating wheel such as Fanatec. I also do not know what if any lag is present within the CM software or what the quality of FFB is. At the end of the day though FFB only works through CM if you have a logitech or logitech emulating wheel, while GIMX can accommodate a much larger list.
Also, GIMX works with FFB on PC, PS2, PS3, and PS4, Xbox FFB support is in development. If you are not using a FFB device it will work with every console including xbox One and 360 though. This is great if you want to experience old Gran Turismo games from the PS2 era with a modern wheel.