Pilot Custom 845 vs TWSBI ECO Black

A music nib really shines when the pen is relatively short and light weighted. Eh, IMO. That is, I personally do not think you may want to choose to buy a heavy, long pen, if you really want to use a music nib. You use the pen, eh, side ways, so to speak, thus it is easier to handle if the pen is relatively shorter and light weighted, IMO

I really really enjoy writing with this pen. I got a Pilot Metropolitan last year so when I initially picked this one up, I was a little put off by how light it felt in comparison. but after a few weeks of using it I'm super happy with the weight difference - this one really glides across the page (in a Clairefontaine notebook) and it's really nice to be able to switch between a lighter pen and a weightier one. it is also of course very cool & useful to see how much ink is left in the pen

it writes good, it looks good, it feels good. The stars aligned to make this pen a desirable purchase for me, even with the high price.

UPDATE March 2019: After over a year of using this pen, I'm my review from 4 to 5 stars. Ink flow is very smooth, and even the slight feedback this extra-fine nib had while writing/sketching is pretty much smoothed out as well. This plastic body is built like a tank; threw it around in all my bags along with keys and phones and everything and there's not a single scratch on it. The massive ink reservoir is also really, really handy for travel and on the go, as I hardly ever have to refill, and the clear body makes it incredibly easy to see when the ink is getting low

I got this pen because it is the cheapest Urushi pen you can buy to the best of my knowledge. Nib is very large and unique, soft, but deffinetly not a flex nib. Very good right out of the box absolutely no adjustments or damage.

It uses cartridges, but doesn’t come with a converter. The TWSBI Eco is a great pen that may be more than you are thinking of spending ($30) but is a really nice pen that could be a buy it once and done. It is only bottle fill, and that adds about $10 for ink, but the pen is great and hold a lot of ink. Depending on your use this can be a factor