First time post, but I've been following this thread for quite a while now.
I got the MW07 a few days ago and I've been testing it with a variety of music. From reading comments on the thread, I was wary of the supposedly short battery life, but expected good bass, clarity, and isolation.
Initial impressions were rather underwhelming. It didn't have much bass, and I had to resort to cranking up the low frequencies on the Spotify app equaliser. Even then, there wasn't much bass, and I thought perhaps other people's expectations of "bass-heavy" were quite different from mine. The sound seemed pretty good otherwise in terms of clarity, but I wanted more bass, so I was ready to return it.
Two things have changed my mind. One-- I realised I was swivelling the earbuds in the opposite direction to how they were supposed to be turned. For the right earbud, facing into my ear, they are meant to be turned anticlockwise; I had a better fit turning them clockwise. This directs the nozzle into my ear canal. Two-- I tried changing the tips and wings. I have large ears, so I used the larger wings that came with the earbuds. That helped a bit. For the tips, I tried using the smaller and larger ones that came in the package but it didn't help much. The isolation wasn't great either, so I tried switching the tips with some on my other cheap earbuds which I knew to have good isolation. This improved the isolation massively, and subsequently, the bass as well.
With these changes, they sound radically different. They now have a very satisfying thud for low freq beats, and great isolation. It's still pretty dependent on finding a good fit (I need to twist them in a certain way until they are snug), but once I do, it produces as much bass as I want, along with good clarity of sound.
If I had to compare these to headphones, I'd say they sound like my DT770s but with a little more in the mid freq range, and a smaller soundstage.
I'd like to try out the Sennheisers for comparison, but I'm very happy with these as they are.
edit: I also want to point out that they have 0 lag when I watch videos on my iPhone and Mac. The mic seems fine too.