100%. I've been thinking about writing an article about McMaster-Carr's design and user experience. I've been using it for 10+ years. It's so much deeper than the web design - the moment you place an order, their return process, obtaining technical specs, datasheets and alternate unit system measurement, the entire experience of shopping on McMaster-Carr. Furthermore, their physical catalog design is also exceptional - from typography to layout, it's the pinnacle of what good design is and exemplifies what's wrong with everything today.
I just fear one day some new intern, engineer, designer or manager is going to join and ruin it. It will be a sad day.