Finally picked up both Delallo pizza sauce (seasoned, less cost effective) and some of their fresh muzz.
I thought the sauce was fine, but I also got some canned whole tomatoes and can't wait to use them. I don't want to say I was underwhelmed by the sauce, but I used crust that could have used some more fridge time, the sauce, and the Delallo muzz, and it just didn't seem to add up to what I wanted. The sauce did have nice, clean, fresh notes, and I hope the tomatoes alone will be even better.
The muzz was fine but not substantially better than fresh that I've gotten at CostCo. And maybe it's heretical, but I've found some of the non-fresh is kickier in flavor. Maybe I've become used to it from commercial pies, or just haven't had that revelatory fresh muzz experience.
Delallo also sells pasta sauce. I picked up a jar of their tonnato (tuna sauce) for about $5.99 (!), but it was pretty doggone good. The seasoning was again restrained, but this allowed the tuna to come to the fore. And you really got how fresh those San Marzano tomatoes are! Yum!