"This stuff is INCREDIBLY good! We always want a hi-gloss white on our interior trim. I used to use Behr's (Home Depot) hi-gloss enamel every time, which is probably 30-40% less than S/W. BUT (1) the Behr would yellow within a few years time, so I would have to re-do to keep things looking fresh, and (2) while perfectly glossy, the Behr had virtually no coverage. In other words, I found that I would have to go over the trim with a flat white to cover up the yellowing, then follow it up with the Behr hi-gloss enamel to get the gloss I wanted.
This S/W All Surface Enamel product not only covers the yellowing with bright, pure white on the first coat (saving both time and, in the end, $), I see NO yellowing whatsoever after 3-4 years.
While this All-Surface enamel appears 'expensive' at first glance, my own personal experience has shown me it's a real steal vs. the alternative!!!"