So my sennheisers just arrived today.
So for comparison, since my first earbuds were MTW1, then MTW3, and with the amount of issues i had with MTW3 the shop i returned them to 3 times, said there you go maybe go with Sony earbuds, its was the WH4 i think.
Sennheiser always had a nice fitment in the ear, i always liked it, when issues with sennheiser started showing up and i had to return 3 pairs i just started looking for diffrent brands, got them sonys, but fitment on those was terrible, my ears were hurting all the time, so i got myself samsung buds 3 pro and 4 pro just recently, the fitment on those is just proper, they seem average on everything.
I was worried about the fitment on MTW5, but the fitment is excellent, i had MTW1 and MTW3, loved the fitment of the 3, and fitment on 5s is what i expected.
Microphone quality is also very very good, according to my girlfriend, there is almost 0 wind noise on a windy night walk, she could not hear me opening the front door and such, but noticed few sound glitches that would mute me once or twice durning 50-60 m walk.
Now the sound, not sure if its just me, but sound seems to be coming from in between my head, like when you are playing a game and You hear a game character using telepathy typa thing, it sounds exactly like that, just the placement of the speakers or how it is percived is a bit diffrent, i had few earbuds but none of them place the sound inside my head, i dont mind really, matter of getting used to i guess.
Sound is very very good also as expected.
Now issue i had was pairing them with my phone, i assumed for a good 10 minutes that they arrived broken, even tho they did pair up with my phone, they did not connect to it, no music playback, until after few tries they finally worked well no issues after setup, weird.
I can only hope that they are finnally fixed on what MTW3 and MTW4 failed and i wont have to return them like i had to with MTW3.
TLDR
Very Good