If I could go back I'd definitely look at an aluminium door. No bowing, no creaking and cracking.
Still waiting for my endurance doors to be looked at, again.
The first front door arrived with incorrect glazing. This was replaced by the fitter, and the door later replaced due to the bowing. Sadly Endurance had fitted the wrong glazing again, so the fitter had to swap it over and the trim doesn't fit flush with the door now. And still lots of draughts due to not making contact with the frame seal. The weather brush strips further inside are cheap and don't go all the way round, big gaps where the hinges are. Had to add some brush tape to block out the major draughts and socks as a draught excluder at the bottom.
Oh and I regret getting a slam door, I should have gone for a lever handle. Pain in the backside making sure I have the keys all the time so I don't get locked out, and a lever handle seals batter, and you can't close it quietly early in the morning/night.
The rear door also has issues with the glazing trim not being flush and sticking out at the corners, came like that from the factory and waiting on the fitter to come back and say whether it's a manufacturing fault. He did quickly look whilst changing the bowed front but I imagine thought better of it taking the 9 panes out, would probably never get them back in.