If you are looking for cheap IEMs that wont break your bank but at the same time can be your daily driver and sound outstanding, these will be the right fit. If you are looking for critical listening, then maybe its worth looking into more high end IEMs.

build quality: pretty good. Cord/earbuds get caught in couch and other furniture often...so far haven't noticed any damage. The silicone pieces earbuds itself sometimes detaches tho, but haven't lost them so far. The first thing to know about this product is that I found the box containing it impossible to open without tearing the cardboard, and the earbuds were jammed into the plastic insert inside, so even if I wanted to return the product, I'm sure it wouldn't be accepted as a return with a torn box. If you're in the market for a pair of earphones, then the Sony MDR-XB50 might just fit the bill. Worn in-ear, they weigh 8 g and are designed for comfort.Great IEMs with punchy and powerful bass, clear mids and okayish highs. The build quality is great and they look awesome (I got the one in red color). How comfortable they are will depend on person to person, but I felt they I could wear them for extended periods of time without any problems. The sound isolation is decent, but its not enough to isolate the noise of a subway train when you are traveling. These earphones had quite good comfort, the tips fit nicely in the ear and sit quite deep. For me they get a bit uncomfortable after prolonged periods of use but that could just be due to me generally getting uncomfortable listening to music for longer than 3 hours. They don't fall out of the ear too easily and don't ever feel too heavy. Overall a very comfortable earphone and which securely fits in the ear. the earphones depending on your ear shape which in terms of mine, the headphones do fall out by themselves not constantly but enough to be annoying .

They are quite comfortable for wearing over long periods of time, including with mild pressure (eg. when slumped over on the bus) Other than the mic casing, these are made from quality material. You can feel it, and I was able to see it over the years with these ear buds.Overall, very satisfied with the audio, and I believe that for most consumers, the audio quality is more than enough. For me, they fit really well in my ears. I've used them at the gym, while running, while on the bus, walking to work...etc and they've never fallen out. The sound quality was very obviously marketed towards the average consumer/basshead, considering that's what the whole point of the earphone is, then I'd say that the sound quality was actually quite decent. It started off very harsh on treble when the volume was above 50% but eventually one they burned in, the sound treble became less harsh and actually quite recessed. The bass is easily the biggest selling point on these, they are quite bassy and give a good umph. The highs are very present but not too overpowering. Mids were decent but overtaken by the bass as you would imagine. The overall sound quality of these were quite decent, a large emphasis on bass but the rest of the sound stayed relatively present.