I gifted myself these and the $20 scale for Xmas via my wife as the straw person gift giver.
My initial take - both are very nice to look/touch, and the espresso/cap compliment each other nicely. The espresso cup looks bigger than expected, though on a generous ~40 gram double shot (my PF takes around 20 grams of loose coffee) the fluid level is just the right height to make the cup look "full." And at least one pro opinion I have heard expressed is that bigger/wider is better than traditional narrow/tall for espresso. The double-cap cup promotes a good ratio of espresso/milk that tastes closer to what my coffee shop serves as compared to what I've been making for my household with conventional, larger coffee mugs.