On L920 - Sound comes through great, but headphone controls are non functional. When playing music the headset buttons for volume + / - do not work. neither does the center button. But as basic headphones to listen to music - yes they do work on the L920 .
On L1520 - Sound comes through great. Center button can pause and resume music playback. When there is an incoming call, there is no need to remove headphones, just push the center button to answer the call. During the call, both the microphone and headphones work perfectly. Caller is able to hear me clearly, I can hear them clearly. Pushing the center button once again ends the call and resumes music playback. The only thing not working are the + / - buttons for controlling volume. Holding center button also brings up Cortana and you can talk to her though the microphone without removing headphones.
FYI - My Sennheiser Momentum are the over the ear version purchased in 2013 Not sure if the cabling has changed since then.