Pros: tight controlled bass response, smaller flaceplate over the UE IEMs
Cons: the fit wasn't quite right on both of my IEM, had to send back
Nice full range frequency response IEM's, the best I have heard. I play out DJing and doing live performances, and also do lots of field recording. They are much smaller in size in comparison to my UE-18's (Ultimate Ears). They do have a slightly different sound signature compared to the UE-18's and UE-10's. The sound though isn't hugely different then the UE series IEM's. I found the sound only slightly different we are only talking very slight differences. I had some issues with my fit not working out the first round, but overall I am very happy with these IEM's.