I purchased this item after having the JBuds J2 earphones for a few months and I can say from personal experience that these earphones are extremely improved from its predecessor, the J2s. The new sleek and slim design fits comfortably into the ear and with four different size tips, one surely has to fit. The cord is very durable even though it is slightly slimmer than the previous model. Also, the four different colors JLab Audio offers helps personalize this product towards your individual preference. After "burning-in" the new J3s, I noticed an overall clear, high quality sound. I've tested this with a variety of music and have noticed improved highs and bass as well. Some people have commented that that there is too much treble but I haven't really noticed this. After you do a "burn-in," the sound quality should significantly improve. The sound is perfect for me but I am just your average music lover, not an audiophile. When listening to music with these earphones, I notice instruments I've never heard before on my standard iPod earphones.
These earphones are great for its price and I expected no less from JLab Audio. Although I am not a sound expert, these earphones should live up to your expectations. The J3's deliver exceptionally on many attributes and are definitely superior to other earphones in its price range. The new and improved J3s are worthy of 5 stars for me. I have had no problems with this product so far and the 1 year warranty that JLab offers should hopefully suppress any worry you might have regarding its durability. The mini case these earphones come with is also a wonderful addition. It is convenient, small, and perfect for travel. Whether you are new to JLab products or a returning customer, you should be satisfied with the J3 earphones. I use them every day and just love this product! I am also impressed at the customer service JLab Audio provides. They really do care about their customer and making their products better. Thumbs up to JLab Audio and the new J3's! This is one of the best purchases I have made this year!