EDIT: Whoops, replied to the wrong comment, LOL. Oh well, I'll leave it. :-)

You know what, I wish it were the Pilot, but the rest of the design just doesn't seem to match the "go anywhere" ethos of the capless function. This one is nowhere near as leaky as the faceted VP I had twenty years ago, but it still gets ink all over the inside and is generally a pain to clean.

These are only part of the collection I've accumlated over the decades, just the last five I've inked, and a couple of them have sat for a few months waiting for a cleaning day. Recently, I admit that the MB has seen a couple of refills, and damned if it isn't actually a super nice pen. My wife got it about a year ago during Les Soldes while on a work trip in Paris, so I like to imagine it wasn't THAT expensive, but it's DEEP into diminishing returns territory. Overall, that little Hero has seen more ink sent through it than any of them, but that's mostly down to sheer age; still, its XF friends I got in the same purchase don't get nearly as much use.

I accidentally responded to your comment under the other one, so you can check it there, but the short version is that these are only what's been in rotation recently, but the Hero is the overall leader due to age, and the MB has been the more recent favorite.