I ordered a Melodrip a couple months ago, fully expecting everything they claim to be bs but wanting to test it out for myself. Don't want to call something stupid without giving it a fair chance. And damn was I wrong.
The coffee is delightfully clear, even at very high tds, and (combined with a crazy nice grinder) I can reach extractions higher than I thought reasonable. I'm talking >25% exty and brews of 1:17-1:20 that are stronger in tds than some of my 1:14-1:16 brews before. Not only without astringency, which I can avoid well enough with my grinder, but with clarity. In terms of taste, which is obviously going to be less objective, I love the clarity, the sweetness, the strength without low ratios, the ability to get perfect flavor notes out of coffees I only have one 15g sample of to brew.
I don't know why it does what it does, maybe the way it trickles the water on slowly stops it from undercutting the coffee so it has to percolate through better, maybe it just keeps the water up top more pure and ready to extract, I don't know. Here I thought it'd be snake oil at best, but damn does it do it's job well. I enthusiastically recommend anyone who likes pourover to check it out.
My singular complaint is the plastic body. I don't care what it costs to make a glass one, Melodrip, you make it and I'll buy it.