Mixing valve quit working - hot side

Needed part. Ordered Part from PartSelect Friday afternoon and figured I'd get it the following week. No big deal. Part arrived at my doorstep next morning before noon. UNBELIEVABLE SERVICE. Not requested, but it was there. So I fixed the machine as soon as I got it. I wish every company had this kind of service. I've already told my friends. It just can't get any easier than this.