Just wondering what the advantages are of Google Voice? What does it offer that I can't do now? Do I have to change my phone number? Thats what kinda scared me away from it. I guess I'm just looking for a compelling reason to use it
The advantages really depend on how you intend to use it or how useful you find its features. The GV site spells out all the features and there are countless guides out there as well. I find the following useful. YMMV.
1. Multiple phone ring - Handy if I'm in the office where coverage is spotty for all carriers.
2. GV web site - Useful for listening to voicemail, sending/receiving SMS, placing calls via my GV number. This has been very useful the few times I've left my cell at home.
3. Voicemail - Transcription can be hit or miss depending on the caller but generally I don't have to listen to messages.
4. Incoming call handling - Several options here. The block option is very useful as callers get a "number disconnected" message. It's also possible to automatically send callers to voicemail and have the voicemail automatically deleted without any notification.
5. Call transfer - Handy for teleconferences at the end of the day where I don't need to sit around in the office.
There are certainly other features that may or may not be useful to you. It's really up to you to figure out what might compel you though.
Most features require that you use your GV number. Basically, if people don't call your GV number then voicemail is really the only feature you can use.