I've been using them for 3 weeks now. They are definitely the best sounding cheap headphones I ever owned. I've been using them with a smartphone and the sound is surprisingly good, you get both bass and treble in a balanced mix, the sound doesn't have any obvious missing frequencies (compared to the off-the-shelf cheap headphones / speakers, where you feel like you're just getting part of the sound).
They are also sturdy. I've even used them while working in the garden, and pulled the cable a couple of times, still working, no visible issues (and I've lost a couple of cheap headphones this way).
The only downside is that they are not super comfortable in the ear - this doesn't mean they are uncomfortable, I've been even using one pair without the foams for 2-3h, and they fit it my ear without any problems or discomfort. But compared to my other in-ear headphones, you do feel them being there more. (For full disclosure the other ones I have right now are sport ones, so the comfort of those while moving might be over the top).
Absolutely great headphones that you don't need to worry about, I bought 4 pairs, and both me and my wife use them when either one of us just needs headphones, without the "ugh" effect you usually get from those supermarket headphones. Amazing sound at a price point where you don't have to worry about loosing, or breaking them.