I love Koh. It's effective. One product cleans just about everything.
The dishwashing Koh is great.
I just started using the laundry Koh. It surprised me: After the first wash, everything looked cleaner than usual. I noticed this on whites in particular. The big test was my grimy gardening pants. Koh made a difference, but the grime is ground in after normal washing detergents didn't manage to clean off all the dirt etc from my very muddy gardening. I'll keep an eye on them and maybe one day they will lose the grime...
Koh gets the job done most of the time!! It saves a bundle on cleaning products.