Put yourself in your listener’s shoes. Have you ever tried listening to someone on the phone who’s just talking so fast? Apart from not understanding what they have to say, you could also be tempted to just cut the call and drop it. Or, it becomes an inconvenience to your listeners for them to have to rewind your message frequently just to understand the message.
Experts rate 8x8 highly for a combination of ease of use, affordability and excellent features. You can easily manage your service with an online portal, and 8x8 doesn't require businesses to have PBX-style hardware or a dedicated VoIP-knowledgeable IT staff to keep it up and running. 8x8 provides free online training regarding the nuts and bolts of the products; if you desire in-person training, that's available at an extra cost.

Don’t forget Packet8 business services. They have a virtual PBX, with real extensions, the ability to have the system forward calls to your mobile phone and actual equipment (if you want/need it). We’ve been using them for the past three years successfully with employees all over the U.S.
Many of our users don’t need calls routed to their phone, they just want a good virtual voicemail system. We can do that, too. Just set up your VirtualPBX account with multiple voicemail boxes for each user or purpose you need. Furthermore, we can route calls directly to voicemail, without ringing a phone first.