OKKO Diablo Gain+ … is it worth?

Quote from Sarasin

I like the fact that you can use a higher voltage adapter with the Okko for more headroom.

Don't use a higher voltage adapter! The voltage doubling is done internally using the switch on the backside. It works with standard 9V (batttery or adapter)!

You're probably right, I'm thinking of a different pedal. I've owned quite a few pedals and amps over the years.

Since getting a kemper, I haven't really used pedals or my amps