The Wirecutter went deep, and I mean deep, reviewing the ultimate pen, and I couldn't be happier that they crowned the pen I've been using as my pen of choice for years now: the Uni-ball Jetstream. Revisiting the page for the black bold-point stick roller ball 4-pack, I saw the familiar Instant Order Update at the top of the Amazon product page, noting the last time I'd ordered this pen.
I have nothing to add to the detailed endorsements: it writes smoothly, the ink dries quickly, it doesn't skip. I haven't tried the retractable versions of the fine point yet, perhaps I'll give those a whirl.
As to nib size, I've always preferred the 0.7mm fine point.