I couldn't hear (Inbound or outbound) and had minor issues with sound dropping out.
What I did:
Update my Sounds Blaster Z drivers (Full uninstall, reboot, reinstall)
Test my Speakers vs headset
VOIP ONLY works with my headset on and mute off. (surprise)
Sounds doesnt cut out when I use my headset. (so far)
Sound seems to work fine on speakers (short test), but I cant hear anyone (VOIP) through my speakers.
Conclusion, if I want to hear people use a headset.