Hi Claudia,
Well on the one hand retail bonds are a great way for private individuals to get access to fixed income investments cheaply. So yes they are a great place to invest money. Much better than a savings account. Bear in mind that you will pay tax on the interest at the rate of the investors income tax rate (I.e. Same rate as your salary). So not really an issue for James
But, bear in mind your bond payments are linked to the prime interest rate. Which is going to go up in the next year or two. However when you buy a retail bond at say 7% you are locking in that 7% interest rate over the term of your investment. So if interest rates rise and you home loan goes to 11%, you're still locked into your investment at 7%. Furthermore you may actually lose money if interest rates rise than expected as the capital value on your retail bond investment with fall.
In a nutshell - look at your financial position. If you have more debt than you are comfortable with then pay some off. Failing that you want a roughly 60/40 split between shares and interst instruments and property. More equity if you're younger, less as you grow older. Bit there are a whole bunch of other bits that interlock and should be managed by a professional. I would def advice you to chat to someone. Maybe at your bank? then they can review your debt setup and reveiw you other investments and you financial standing as a whole.
on a stndalone basis, assuming james has no debt or other investments

a prudential balanced unit trust should give you a balanced and managed investment option