Furthermore, someone else mentioned that if you put the savings from going variable into a seperate account and only dip into the account should the rate go above the fixed rate, at what would be the end of the fixed term, you will almost certainly have a surplus in the account.
I've highlighted the key word there, remember there are no guarentees and a variable rate is always a gamble. However I do agree with you that they are a good idea, provided you have flexibility and breathing room in your finances. If money is going to be tight a fixed is the best option as it is guanrenteed and you can plan your finances around it with certainty.