Some of your links on the page point to http://www.ifix4u.co.nz/?page_id=588 but resolve to http://www.ifix4u.co.nz/special-promotion-deal/ducted-ventilation-system They need to be updated.
Banner at top looks like a menu. Drop shadows could fix that from being plain looking text like the menu.
Speed could be improved by reducing white space on pages, in the html the are large sections of spaces between div statements, which have no function but make ya pages bigger.
The scripts could be combined into one file to reduce load time, but that's minor. why do you need to load the testimonial script on every page? That should only need to happen on the testimonial page.