I've seen it first hand and have for a while. Honestly it's a direct competitor for Cantrol. If you are going to get SUPER in depth in your vehicle's setup, I would go with this system. It's considerably more cost effective than the cantrol setup.
That said, be prepared for the amount of work this setup will entail. It is very complex and can be even more complex with your intended lighting setup. I see this and Cantrol being at the top end of the market ast far as vehicle control systems. Know what you are getting into. If you are not looking to synch every aspect of a vehicle (and be prepared for the work involved), I wouldn't spend additional funds on it.
That's probably where the Feniex 4200 comes into play. The 4200 has the versatility to do everything with exception of the synch. You just have to know how to program and control the 4200 to do it. I get countless emails from people asking for help with the 4200 (not that I mind). Once they get the basics down in a few minutes they get creative. I've been able to create total vehicle synch setups using a 4200 and all Feniex products before. It's pretty time consuming but it was a fun project.
What this will come down to is what exactly the installer feels comfortable doing and the customer having a firm grasp on what they TRULY want and need.
As far as all of us that lighting addicts? It's a kick ass setup