over the past 5 year , I have own 6-7 different pair of earbud headphone range in price , and decide to buy the jlab j3m base on positive review , price and a desire to have a good pair of earbud with a build in microphone . after a few month of ownership , at this price point , I would say that the j3m be decent in term of sound quality -lrb- some fit issue aside -rrb- , but have other issue which would make I not a repeat purchaser . - the first pair I receive break on the second day -lrb- the earbud\/speaker separate from the plastic cone\/casing , disconnect the wire -rrb- . however , I be thrill with jlab 's customer service , as they replace the earphone free of charge and very quickly . that kind of service score bonus point with I and assist my impression of jlab . - for the most , these headphone be as advertise . the sound quality be decent , but the design of the earbud make it difficult to get the right in-ear seal necessary to get the best sound . have own lot of earbud over the year , I have be familiar with the different type of attachment , but the issue be more with the length of the earpiece itself . the piece that the earbud attach to be too short , and even with the right attachment will not allow itself to be positioned properly\/deep enough for the best-sounding seal . while everyone 's ear be different -lrb- and I prefer a earbud that can be place deep in the ear -rrb- , I have not have success with this pair . when the bud be hold into the ear , you can get close to the right seal , and the sound , in my opinion , be slightly better than the Sony $ 40ish earbud , but not as good as the Shure e2c or the etymotic er6us . on the positive side , the cable feel sturdy and do not get tangled easily . no issue there so far . - the microphone do not work on my set . I be not sure whether it be because I have a iPhone 4 and there be some compatibility issue , but when plug into the iPhone , call be distorted and people I be speak to can not hear I . when I disconnect the headphone and speak into the phone itself , the same call be perfect -lrb- so it be not a iPhone 4 reception issue or anything like that -rrb- . since I have already have to replace one set , I be not bother to replace this pair in the hope that the mic will work . overall , I think this set be decent in term of sound quality , but I would not buy another pair if my current set break . I feel like other product at a similar price might be a better option . I have find the etymotic er6us to have the highest sound-quality and best fit of the recent pair I have own , though the cable be thin and break after less than a year of use . the Shure e2c be also a good pair both in term of sound and construction , but one earbud break randomly with no apparent damaging . that be say , I would most likely try another Shure product or another manufacturer before go back to JLab .