Pros: Sound quality & 'all around' sound signature.
Cons: Quality control issues, seal issues.
This set really impresses me every time I use them, they have great overall presentation & ability. Tuned for all-around use, they are very well balanced, with ample & precise bass, decent mids & decent highs. There isn't anything snazzy about them, but they are great to just grab & not overthink. Definitely not made for critical listening but great for just enjoying music with good quality sound.
I highly recommend them if you can get them on a lightning deal for $79, but they are a decent deal at any price under $100. There are many other options out there, but this set really satisfies a niche for me, of high quality & good balance without the frills.
I did have a QC issue in that the left speaker quit working properly & was not putting out very much sound, I've read elsewhere of this problem. Monster's customer service was great, no questions were asked I just mailed the set to them & they mailed a replacement, probably 2 weeks turnaround. There are also some fit issues in getting a good seal, it is simple to get a good seal but sometimes has a sort of 'vacuum' effect where you have to play around with the position to get the seal how it is supposed to be.
Overall I'm very happy with these as a backup to my W4.