hi, i'm a pod hd500 user, i used to love it but cannot be compared to the kemper.
In POD HD500 took me 3 days to tweak a good high gain preset
In Kemper i just choose a profile and took me 20min of tweaking and it sounded much much better
kemper quality is great, you wont need to spend hours tweaking, just choose a good profile and then tweak a little, thats all, fast and easy