Bought these as a replacement pair for the ones I used previously which were the ones I got with my Samsung Galaxy S2. I quite liked them, but water got in one of the ear pieces and it died on me.
Since these were only 10 pounds, I thought it can't be that bad. It isn't but it isn't great. I've had these for about a month now and I have used them every day since I've got them.
I go to university 4 out of the 5 weekdays so I'm moving around a lot. When I'm walking I can hear the headphones rubbing against my shirt or jacket and it's not even a faint noise, it's like a thudding noise when I'm walking.
The fit is another thing to complain about. It does come with Small, Medium (already fitted on the headphones) and Large buds. I normally use the medium buds, which fit perfectly fine. But these didn't fit snug like my old pair did. I would have to push it right in, which is irritating.
Of course, if it doesn't fit snug, you're never going to get sound-isolation with them. Which is what IEM are made for.
Sound quality is decent. Bass isn't overpowering, but there is enough of it. Highs and mids are okay.
I lost one of the medium buds in about a week just from taking it out of my pocket. Then lost one of the small ones again, taking it out from my pocket. I can't use the large one because it doesn't fit. So I had some old sennheiser buds, they're a little loose but will do. So my word if advice is be careful with the earbuds, they come off easily.
Overall, the Novero BROOKLYN headphones are good headphones if all you want them for is to replace them for ones that you may have lost and maybe for temporary use.