To be honest I got these specifically to mod out of curiosity. I haven't modded anything yet but I'm used to much more expensive gear, so here's my perspective on them.
Fairly neutral, bass rollof could be a little lower but overall pretty good for $50.
Excellent treble for price range, good extention without sibilance, and not tiring.
midrange is good, not perfect, but it's smooth and full sounding.
Imaging is kinda meh, I played some video games with them and I found it hard to distinguish exactly where sounds were coming from, it wasn't bad by any means, and far better than others in the price range.
Soundstage Is on the intimate side, better than most headphones in this price range but still sounds like it's coming from the speaker just next to your ear, it just doesn't have the width.
Comfort - Needs pads. Pads aren't bad but too shallow and my ear touches the inside foam against the driver, not uncomfortable but could've been improved with slightly thicker pads, I'm going to find some velour ones and try them out.
Build is not the best, it uses mostly good materials but I dont know how long the plastic slider is going to last.
Overall I give it an 8 out of 10, deductions are for cable, (not the length, it just kinks easily) the build, and the comfort.
Also if you're looking for cheap headphone stands, get some AmazonBasics yoga blocks 2 for $9.99 with free shipping. They work great.