I'm not supporting the cronusMax, I just threw it out there because some people don't want to DIY. I think the setup for the cronusMax would be a PITA compared to any GIMX setup. From the video it looks like you have to turn on the game system, then hook up the cronusMax, then wait for its animation, and then hook up the usb hub connected to the wheel. Oh and not to mention needing to make sure to connect the wheel to port 1 and the DS4 to port 4. Even a PC connected GIMX setup involves less steps then that. Turn on your console and machine, then its take a couple click to run GIMX. An automated RPi setup can make the startup almost as seemless as actually having a compatible wheel. I have a T300, but I use the GIMX'd G27 more just because of the evolution of GIMX and the DIY aspect of it. The startup sequence for me is basically the same since the T300 can't turn on my PS4. I personally advocate the automated RPi GIMX route. It's gotten to the point where all you need for the DIY portion is an RPi, a couple of resisters, and a teensy board.
I've watched the cronusMax video a couple times now, and I can't tell for sure, but I think I see a wee little bit of deadzone when using the cronusMax with Project Cars. There are a few times that I thought I noticed the guy moving the wheel a little, but the car doesn't do anything until he turns more. Not sure if its just the driver, but some of the turns he makes don't look right as far as how he's turning and what the car is doing in the game (again Project Cars). I mean the car is turning how he turns, but something about it just didn't look right, it reminded me a little of how controller emulations behave. The last F1 style game in the video looked fine though.
There is another video where a guy is playing Drive Club, and the wheel looks like its lagging a tad. I know GIMX doesn't take much computing power, but how much computing power does the cronusMax actually have?
All that ranting and I haven't even gotten to the lack of DFGT support, which is a lot of the GIMX community that I've seen.