Yeah it works quite well.
As usual, the biggest problems are with video and mics in meeting rooms with bad acoustics.
Everything else is good.
#achievements works especially well because it gives a persistent, short-form log that people can read quickly when they come back from days off, for instance.
We minimized that problem by using a free app on a smart-phone that turned it into a microphone for the PC running the Skype call. Team members in the room would pass the phone around.
