Either the Uni people listen or they came to the same logical conclusions their customers do—there should be a fancy Jetstream multi pen, there should be D1 Jetstream refills—VOILÀ! Both of these things, in the same pen. Thanks to JetPens for providing this sample.

And most of all, thank you for blue, and not pink. Pink exists now though, for those of you who are not me and love pink
The body is metal (type unspecified), the paint job that same enchanting metallic finish typically reserved for bumper cars. But classy. Like a Ferrari bumper car.
Up top, we’ve got some of the most subtle multi pen markings I’ve ever seen, coupled with what I’ll assume is a curious homage to Legos. Sure, you are a fancy businessperson now, but your heart hasn’t forgotten how crucial the carefully collected gem panel was to the city-defending death ray you had Lego Anakin Skywalker man. Or whatever it was you used your Lego gems for.

Put them in treasure chests? But then where would we keep all of Lego Queen Amidala’s extra hairstyles?
The knocks are so smooth, strangely smooth if you’re used to multi pen components that are pressed inward and down to deploy. They are extremely satisfying to manipulated, and probably guaranteed to drive coworkers crazy. At least they won’t drive you crazy—they never fail (not in my experience so far, no getting stuck, no randomly undeploying, just solid mechanisms).
I do question the comfort of the all-metal body, especially in the grip area, particularly if you like to grip hard. I have to catch myself when I’m writing to readjust away from a death grip, lest I press the pen uncomfortably into the base of my thumb. Maybe adding a regular grip would do nothing to alleviate this, but an Alpha Gel Grip? What you’d lose in svelte aesthetics you’d gain in heavenly grip comfort. Maybe if I suggest it enough times, it will be reality. Alpha Gel Grip Jetstream Multipen of Fanciness. Alpha Gel Grip Jetstream Multipen of Fanciness. Looks like for now, this will remain but a dream.
Moreso than the Uni Jetstream 4&1 multi, these refills rattle when writing. When I pick the pen up and put it back to the page I can hear it, enough to be noticeable. Not quite enough to drive me up a wall yet, but given the choice I’m inclined to go for a quieter writing experience. Or, there are some sounds that are soothing to hear when you write, like the gliding of a nib as it lays ink on the page. Refills rattling is not one of those pleasant sounds.

I almost want to ask for more colors, but knowing the track record I’ve experienced with non-traditional Jetstream color inks I think I’ll keep my mouth shut
The performance of the refills is satisfying. The colors are rich, and above all stay off my hands. The black seems to perform best of the three colors, but that might just be my imagination. Is it as good as a regular Jetstream? Perhaps not on the most microscopic, nitpicky level, but it’s much smoother and more satisfying than any other D1 ballpoint refill I’ve tried so far. Is there a bulk discount on these refills? I have a lot of mini ballpoint pens I’d like to upgrade.
Is this the best multi pen your $45 can buy? I guess it depends on how much of your childhood was dedicated to Legos. This is the sort of pen that would make a great gift to receive, but might not necessarily be a pen body you clamor to buy for yourself. The D1 refills that this body brought to pen existence are another matter entirely, and I strongly advise you to stock up and retrofit as many little pens as possible.
Uni Jetstream Prime 3 Color Ballpoint Multi Pen – 0.7mm – Navy Blue Body at JetPens