I joined for one of these last drop. It's a pretty good product, though if I'd had a model to "test" first I don't know if I would have paid $45 (let alone $60) for it. It's sturdy and I haven't had any issues with damage from rough treatment. I swapped out the cartridge it came with and replaced it with a Signo RT 0.38, which fits perfectly. It will only take refills in that general shape, so unfortunately I wasn't able to use my hi-tec-c refills. My only real complaint is that the magnet that holds the pen to the barrel isn't very strong, so it's easy to dislodge with only a bit of shaking. I keep mine in a bag, so this doesn't really affect me, but people looking to tack it onto a keyring or have it hang should be aware that you might find the pen missing one day.
Don't get me wrong, I like the product overall and use it frequently. I'm just listing my personal negatives here for other potential buyers, so this probably seems a lot worse than it is.
Note that this drop only comes with a single tip (this is the "new" pen, I believe, so it doesn't have the old angled / screw one that let you use other refills if you trimmed the barrel. The new tip is very much drafting-style, so you can only use the uniball ones). It also does not include the lanyard you might see in their product photos elsewhere.