The price is right, it works with all of our devices (Macs / PCs) as well has mobile phones so that's great to be able use this from anywhere in business or home without being tied down by an expensive phone plan where we could only connect when physically at work! Nothing really - if you are looking into getting VoIP services then I would compare prices against other providers before choosing who offers what features which will suit best within budget restraints. We have been using voicemail via Skype since 2011 but now need more functionality like transferring calls directly between users instead having one person leave messages waiting until another user gets their own computer etc.,etc..