Segmented doors are a bit more expensive, but with one-piece canopy doors, because of the geometry when they open or close, you always have to make sure there's nothing in the way when you're opening or closing them. Normally it's not going to interfere with your car's boot or even the back of an estate car, but there also isn't much room for error.

We've got a segmented door that's powered by an electric motor, and it's been surprisingly maintenance free. It's been doing its job for over 40 years and all it has needed were a bit of fresh grease on the chain drive and the rails now and then and a lick of paint on the outside every ten years or so. Segmented doors are also typically made of aluminium, which is more corrosion resistant and lighter if the motor fails and you have to push it up by hand. Canopy doors are usually made of steel because large panels of aluminium would lack rigidity, and it means they can rust more.