I bought this pen purely because of its looks. I opted for the violet cap.
It arrived in a very nice, card, presentation box, in a nice sleeve. For a £25 pen I thought the presentation was excellent. The box contained a cartridge and also a cartridge blank. The Loom takes the short cartridges and the length of the barrel means you can use the blank to ensure the cartridge remains securely attached to the feed. You could also do that with a spare cartridge. I bought the Faber-Castell converter, though, as I prefer to use bottled ink. There's something I find quite soothing about the act of filling a pen from a bottle of ink.
The Loom is heavy, possibly the heaviest fountain pen I have, weighing in at 34g. My Parker IM is 30g and my TWSBI 580 is 28g, although it really doesn't feel like it.
The Loom looks gorgeous, it really does.
I currently have it filled with Diamine Imperial Purple and the colour on the page seems much more intense than the same ink in either the Kaweco Skyline Sport, or the Parker Rialto (all three with a medium nib). Mind you, both the Kaweco and the Rialto have a definite breadth to the nib, almost as though they have a flattened tip. The Loom produces a very nice, rounded line.
The nib on this pen is quite possibly the smoothest I have ever written with, it really is. It just glides across the page, it really is beautiful to write with. Unfortunately in use the pen is a little fatiguing, because it's so heavy.
Some reviews have commented that the grip on the Loom is slippery. I haven't found this to be the case at all. My Parker IM does have a slippery grip, as is sometimes the way with a metal barrel. The Loom doesn't, nor do the horizontal grooves bother me much.
The cap is a very firm fit - it can be hard to get off the pen. It comes in a range of stunning colours (yes I am tempted to buy more and fill them with matching ink colours), but it does feel quite plastic.
The pen can be used posted or unposted and the cap doesn't really alter the balance much, which is handy.
Overall I am very impressed with this pen. The only negative at all is that it is a little heavy. Aside from that, it is an absolute winner. And that nib… it pushes this pen into a close second place, after my trusty Parker 45, with its 14k gold nib.