Anyone have experience with E85 vs Gas?

Although I did have an E85 4500 carb for our W5 program, we never used it. The thought crossed my mind with the W8 build (both 13.5-1), but..... none available local anymore. I could stop in Vegas where Tony goes, but that only helps when I go to Vegas. Another friend runs E85 up there and one time the E85 wasn't so 85.... They ended up buying Sunoco E85 by the can at the track so they could use existing data to try and "run the number". While VP C-12 is f'n spendy, It's available, it's consistent can to can, and it can be stored long term without any issues. Currently I'm at about $600 in race fuel this year, so yes, the price difference could pay for a lot of inconvenience for sure! I still think about it.....