I kind of wish that I could give a rating of 4 1/2 stars because while I have some nitpicks, they aren't enough to warrant a demotion to 4 stars.
To start with, my first impressions of the fit was that it was slightly uncomfortable to wear, but this mostly resolved itself after I fitted the tallest yellow eartips and then spent some time breaking them in.
I also initially heard a slight rattle at certain frequencies but that too went away after some use.
As for more lasting quibbles I personally found the sound signature to be a hair bright for my liking but the sound is otherwise excellent and it may just be that I am somewhat used to slightly dark audio.
Overall I would definitely recommend this to anyone looking for a pair of earbuds at this price.