I put it in my cub when I re did the panel, and I had the boot cowl off. It was really easy to do at that point, mounted the box that all the wires run into, and ran all the leads and put the boot cowl back on. Very straight forward install.
Flying with it is great, only problem was, now I have high cht's so I had to do some work to the cowling and baffles. Which really isn't a bad thing. It takes about a minute after powering on to get to the home screen. Very simple to use. I have to send my display back to EI. The fuel total (which is great to have) has been re setting its self, sometimes to zero and sometimes to full. The tach has also been resetting it's self too. Sucks because I fly every day, but they said send it back and we will look at it, never had that problem before. Other than that, I love how the install went, and all the features. I did have one probe go bad, and they sent me out one no questions asked. The slow response, which is what I got with the cgr, is interchangeable with the fast response.
I will update once I pull the gauge and send it back to them. If I can stop flying long enough.