You can get them at the supermarket - coles, woolies.
They are more expensive, dont remember the price tho! and are not reusuable.
And more accurate?? I am not too sure. I guess they are simple because the say either pregnant or not pregnant. BUt when you pull out the cartridge, it still has the same double lines as a normal HPT would have. So it would still have to come down to how much hcg you have in your urine.