I've got quite a bit of Goodthreads stuff. I'm listing in order of my personal satisfaction.

Standard-Fit Short Sleeve Printed Poplin Shirts I bought 5 for $20-$25 (depending on pattern). I went on a heavy short sleeve button down kick last year and ordered a bunch of these after finding my perfect fit. I love that you can have a fun pattern like a Hawaiian shirt, but without as much goofiness. They have a ton of options and for the price I think the quality is great. Sure the material isn't fancy tech stretch or silky smooth, just your standard fairly thick and sturdy cotton, but I'd rather have 5 of these in different patterns than say one from Lulu or a designer brand. I've worn all of them probably 5-15 times and don't see any wear issues. On fit, I'd say they are TTS, I vary between M-L and went with medium because I wanted a more fitted look for wearing mostly in social/going out type situations, I don't wear these to work even though my office is casual (in the before times). I'm 6' 185lbs and have a 32in waist, I do work-out but wouldn't say I'm any body builder or anything, but they are a little tight in the chest and sleeves, but again that's the look I was going for.

7" Inseam Swim Trunk bought for $18. These are just a good, sturdy but comfortable swim trunk. Again, there's nothing special or tech feeling about it, but it does the job of just sitting around the pool or beach very well. These are not the trunks for swimming laps or doing active aquatic activities. The material is much thicker and less flexible than an average swim suit, almost like wearing a patterned chino short with a mesh liner. It doesn't dry super quick, but I don't find that an issue on a hot day. The main benefit is that you don't get that suction to your ass and crotch effect when you get out of the water compared to a thin, stretchy, quick dry suit (but idk maybe some of you find that a benefit if you want to show off the goods in front of the ladies). I got a Medium again and the fit is nice for my 32" waist, just a little bit of tie needed to keep them up, and the bottom falls at an appropriate length about 3-4"s above my knee, I have large thighs and they fit nicely, so if you have slim legs they might look too baggy.

Lightweight Slub Polo bought for $17. I got this in burgundy, and I love the color, but I won't rave about the quality as much. It is thin, as described, but almost on the point of being see-through if you give it a stretch. I got it for situations like a summer outdoor concert or backyard BBQ where you want something that is basically a light T-shirt but slightly more formal and it does that job pretty well. I also got this in medium and the fit is pretty snug, a little more so than the shirts above. Again, at their current price of $20 I wouldn't not recommend them, especially if you know you want a cool, casual, fitted, collared T-Shirt. But not a killer deal right now.

Straight-fit Wrinkle-Free Dress Chino I bought a pair of these for $30 and was pretty disappointed. I got them in grey with the goal of having something a little different than my standard khakis to wear to work, but pretty quickly discovered I'm not a front pleat guy. The quality of the material is pretty nice, thick and sturdy again, no stretch. At their current price of $13 it's a great deal, so if that's your style (or want to do some early xmas shopping for Dad) go for it. I can't speak to longevity since I've probably only worn them like 5 times, and they do already have a little bit of fuzziness showing, not enough to be noticeable from afar, but won't promise they will last forever. They are basically non-wrinkle right out of the dryer, but the pleat does not go away. Maybe if I really tried to iron it out they would stay flat, but it looks like you'd always have a mis-colored line on the crease so I just donated them. I got 32x32 and the fit is TTS, but I really need a 32x33 which isn't carried. I could have gotten 32x34 and had them hemmed, but that feels sort of silly now for $13 pants.

Overall I've been very happy with the quality and value of GoodThreads clothing, and I think they generally better than comparably priced stuff from Gap, Old Navy, or J Crew type stores. In my social context of hanging out with mostly people who recently graduated college and don't ball out left and right, I'd say they do a great job, but if you are one of these people on here who wear $2k Italian suits and Canada Goose jackets I bet you would be disappointed.