Hi there,
out of the box, the resolution runs at 320x240 @ 15fps, with audio. This requires around 300kbps upstream to the guest vm. This is in addition to the normal PCoIP bandwidth.
We have been using it here with great success and it works really well with skype. We tested with latent/lossy networks too, and it performs well, but obviously the better the network and the lower the latency then the better the experience.
I certainly would be interested to hear other people's feedback on how they have found it, but from the feedback I have had so far then people have used it with great success.
Note that skype sometimes (even on a physical machine) can hog the cpu, and we found that really for skype to be "happy" it needs 2x vCPU. I don't know if more recent versions of skype have improved in this regard, but the recomendation is for the vm's to have 2xvcpu.
There is more information in my blog bosts here:
and here
cheers
peterB