We have had VOIP for quite a few years now and would never go back. We pay around $5 per month to have a phone number and then it's only 12.5c to make calls anywhere in Australia. We can call overseas for super-cheap too because you only pay for a local call over in that country. I have called a Chinese mobile number, chatted for over and hour and it was only around 50c lol! The other bonus is that you don't get any telemarketing calls because the number is kept private - yay!

I personally like having a normal "home" phone as well as mobile phone (plus I need one for business anyway) - our family all prefer to call us on a landline and I never worry how long a phone call is taking. I only really use my mobile phone for texting or internet when I'm out.