I absolutely love it, specially the icons for it. Just 2 things that would be better in my opinion are if u would allow us to change values in the mod settings, something like "Mythic Quality" mod does, it has 3 presets for us to choose.
And maybe put the additional qualities behind Promethium science, or at least just Artifactual behind it.
Anyways, love the mod and icons, dropped Mythic Quality for it, just wished the final quality to be behind Promethium science and maybe a few presets to quality values. GJ

Hey! Believe it or not, I am currently working on such a feature (settings adjustments).

I'll see what I can do about making a difficulty pass and/or a recipe pass to make the options available.

I'm glad you're really liking the mod! Hopefully it will only get better from here on out.

Love to hear it! Nice, I'm just getting to Fulgora and I'm playing with over 20 planets so I don't think I'll be seeing even legendary anytime soon lul.
Well, gj, can't wait to use it!

Quality power and special attributes can now be adjusted under Settings -> Mod Settings -> Startup.

Very nice, can't wait to unlock the new qualities. GJ

It would also be great if we could choose how many new quality levels we want to play with. For me, for example, 4 new levels are a bit too many, I would like to play with only 1-2

This was something I was thinking about as well. Ill likely implement it.

You can now select the number of new qualities you want to play with by disabling qualities in the settings menu.

That was fast, thank you!
Another moment I noticed: with new qualities they're all display as a dropdown in the inventory just like in older factorio versions, would be good if they were buttons as in the new versions.

That.. is something I didn't notice. Ill see if its possible to fix.

https://mods.factorio.com/mod/configurable-quality-buttons?from=search fixes this for any mod that adds additional quality from what I understand

although it needs the experimental version of factorio

Oh that's fantastic. I'll definitely take a look at this. Was checking out the Prototypes and Runtime docs to no avail.

Can arbitrary qualities be selected at startup? Only, the Masterwork icon being asymmetrical is one of those tiny things that keeps catching my eye...
[Edit] Actually, not a minute after posting this I realised that Rare quality is also asymmetrical; you'd be amazed how suddenly this stopped being an issue for me. Sorry about that, didn't mean to complain..!

I had honestly contemplated a few different ways in making the masterwork quality icon be symmetrical, but it broke the art style paradigms of Factorio. If you are seriously interested, crack open the mod and look at some of the unused graphics. Most of the symmetry involved came from making circular instead of square bases. It was weird. Haha