Great product. One things that means we can't use it right now in our office, but which I assume would be quite straightforward to add: It is really important to have the option in the settings to select the particular sound playback (for phone earpiece) and recording device (for phone mouthpiece). We have 50 staff who use their PCs for a variety of applications and who also use a low cost USB phone handset (DLink DPH-10U). It is not possible, nor desirable, to have phone call conversations coming out of the main laptop speakers in a busy office, nor to have the normal Windows/other application sounds coming out of the USB phone handset. Either of the above could be accomplished by changing the Windows default sound device before the VOIP client is started. However the VOIP client really needs to be able to select its own sound devices in order to work seamlessly as a standalone phone. Also, it would be very sensible to allow an independent sound playback device to be chosen for the phone ringing sound on incoming calls (this would generally be set as the main PC speakers - in order to attract the user's attention when not holding the USB handset the ear, or when a few feet away from the desk). Consider the fact that a normal office telephone doesn't send it's incoming call loud bell ringing sound from the phone earpiece - it has a separate bell/speaker which is much louder and can ring without the risk of accidently deafening the end user. This would be a must-have for us in order to use the VOIP client as a substitute for a hardphone. Thanks.