I took the scenic route to loving these headphones and almost sold it a couple of times. I picked these up for free thanks to a promotion my carrier Freedom mobile was doing where if you buy the LG V20 phone you get these headphones free.
 
It was a no-brainer for me as I needed a new phone and could even sell them if I didn't like them. Anyhow on to the review....
 
Build Quality
Considering the price, the build quality on these is poor. Mine had some finish problems with the connector so there would be static when connecting to or moving the connector to my phone. Thankfully things smoothed out after rolling it around enough and this problem is gone. The back of these is a pleasing solid metal but the front is made of plastic and is a bit thin. So you need to be careful when changing tips. I also had a difficult time with the stock tips. Fit was crappy, either to big or too small and never felt comfortable. My spinFits saved the day tho. To sum, the build quality is way below what you expect at the price these go for normally and an embarrassment to the B&O name.
 
Sound
I hated the sound from the stock tips, and before the burn-in the sound felt muddy. After 8hr burn in, the sound stretched out and a lovely detail began to reveal itself. Compared with my other regular the Co-Donguri SHIZUKU, these have an entirely different appeal. These headphones really excel in presenting a detailed and intimate sound signature with vocals and string instruments revealed in full glory. The bass is also surprisingly detailed and well extended once you get the right tips. The problem comes in the treble which are slightly rolled off.
 
Unlike the co-donguri, the soundstage is compressed but because of the detail in the mids and bass the imaging is quite excellent. I really enjoyed the cozy intimate feel of these...perfect for a winter night of listening.
 
Conclusion
Are they worth it? At $0 dollars absolutely! The LG is an excellent phone so this is a nice cherry on top of that lovely cake. Without the promotion though, I really can't recommend these. The build quality is simply too poor for the price. Still if you can get it cheap, and you love warm, intimate sounding headphones go for it.

I picked these up from CD Japan for only $56 CDN and I have been floored by the quality. I tend to like headphones that excel in imaging and have a wide soundstage. I'm still a newbie in the headphone world so I will keep my opinions brief.
 
I've owned the following:
beyerdynamic dt 990 (600 ohm)
B&O Play H3
Audio Technica ATH-IM50
Bose SoundSport
 
Equipment Used:
LG V20 (This headphone appears as normal audio device)
Music from Apple Music
 
Build:
The build quality on these is amazing. Really solid construction and the spin-fit tips they provide go a long way to provide a good seal.
 
Sound:
When I first tried them, I was disappointed. The sound was hollow, base was lacking and the treble felt scattered. I switched to the larger tip and the bass came back a bit but it still felt restrained. I put it on one of my 8 hour playlists and left them to loosen up. When I tried them again I was at first pleasantly surprised, then shocked and then left speechless.
 
The base extends very deep to the point that you are left feeling it. The whole bass range can be described as tight and precise with no spillover to the mids. The mids are a bit recessed, but not overly so. Finally the trebles soar and leave you floating in low earth orbit.
 
From the headphones I've owned these sound like IEM versions of my lovely dt990s.
 
Comfort:
Where I find these lacking is in comfort. I love the comfort and stability of the bose and I love the fact that I can sleep on my side with the H3. These headphones are not stable on my ear and side sleeping isn't comfortable either as these babies got a little too much booty and stick out. A soft pillow managed to fix this problem though
 
Other considerations:
There are hacks that trick the LG into thinking these headphones are high impedance and thus push through more juice to the headphones. I really think they can fly with more power. While I won't be trying these hacks, I will be trying it with the Schitt Magni 2 once I get an adapter...I can't wait to see how these will go
 
Conclusion:
Amazing sound, incredible value. I bought these with the IM50 and these left them in the dust. The H3 was able to compete in the bass and had slightly better mids but I felt the soundstage was a bit narrower in width and much narrower in height.