UPVC is known for being a cost effective material with high energy efficiency properties. It also lasts along time. For use with a door, it’s best to ensure the frames have built-in galvanised metal reinforcing to prevent distortion.
Quite a few homes have used large version of this design for patio or conservatory doors – however, you need to bear in mind that the door or window will open inwards. This means you have to make sure that the swing arc is clear of obstructions.
In the end, it could be down to budget or just personal preference when you decide which is best for you. The smart way to go about it is to get a few companies over to survey & quote for you – they will come up with some ideas about design that can help a lot.