HEIDTS IRS for 2nd gen camaro

[SPG]

Hello, I was looking into rear suspension on my 75 camaro and found two IRS kits for my car, HEIDTS, and art morrison. I know someone uses the art morrison and they're fantastic, but has anyone used heidts? I know a good leaf setup does wonders but obviously if budget is not an issue then IRS is the next step up. Just want to know if anyone has experience with this set up and if they recommend it.