Everything about AliExpress feels like a scam to me - the prices aren't reliable, shipping is all over the place, there's lots of flashing sale symbols, etc. There's coupons codes that don't seem to work for me.
And for the things I was looking for, the deals weren't that great (enclosures were the same price as Tayda, or much more when shipping was included). Or the quality just looks suspect, like Temu-level materials.
The one time I actually placed an order (a few budget Joyo pedals), the order was cancelled by the seller after 2 weeks.
I've basically sworn it off. I keep hearing about people finding great deals and I feel like I'm missing something.
I use it a good bit for small stuff. LEDs(grown fond of these, sanded to be flush with the enclosure), bulk resistors, cheap cable ends for non-mission critical cables, banana plugs and cables, Dupont lines and adapters, $30 looper pedal for bench testing, Daier aluminum knobs, pogo pin clamps, ESD bags, thin washers and hardware in general(outside pedals) can be a good deal, especially stainless. I think the hot air station has been my largest item purchased.
The trick is getting Choice items which all ship free. I haven't really had much issues with prices changing but shipping can be weird when there are shipping charges. 1 item cost $4 to ship, 2 cost 6, 3 cost 12. I think the looper is the only pedal I've actually purchased but the Mvave Chocolate midi pedal that recently came out is tempting. Some of the Joyo reverbs sound nice for the $. I have a Joyo Atmosphere that I got off of Reverb for $35 that's really good for the price.
SBP actually had the best price for 125bs a couple of months ago with the volume discount and the quality seems a little better than tayda, seeming smoother and more level.
Outside of bulk resistors and jellybean diodes, I don't fool with any components from there. I did get some Chinese germanium trannies a year or so ago out of curiosity (that look a lot like the ones Warm is using in their pedals). A couple were functional but the rest were trash. Got an immediate refund.
I tend to purchase with the thought process of "buy to cut out the middleman, don't buy the cheap Chinese version of the thing" and that tends to work out okay. There are good things to be had, but it's far from everything being good.