I had some bifold doors fitted. The fitter, an independent sole trader did a good job and the doors look great. I have found the following elements disappointing: 1: These doors have quite a slim frame. The trickle vent is on the frame and not one of the openers. The vent directs the air upwards and the design of it is such that it relies on gravity to keep it open so doesn't work if turned upside down. In my opinion the frame is too narrow for this vent as when plasterboard is fitted 12.5mm and then it's skimmed with plaster the vent only clears the surface by about 1mm. I had intended to try and use some thermal backed board to reduce condensation but this wan't possible. It isn't even possible to wipe the paint between vent and wall. I haven't experienced a winter yet since fitting but suspect I may get mould. Time will tell. When looking at other houses prior to purchase I found vents had been recessed into the plaster by nothing out the board around them. I considered blocking the vent and cutting one into the opener but expected this would invalidate any warranty and would leave a redundant exterior vent visible. The solution for me is to put the vent in one of the doors on such a slim frame. 2. The magnets which hold the doors open are too weak. When just the main traffic door is left open, held on the magnet, even the slightest breeze slams the door shut. I have to hold it open using a weighted object which is disappointing for such expensive doors. I have some small 'rare earth' magnets I use for holding race numbers on a vest and these are much more powerful. 3. I intend to contact Origin about a security issue with these doors associated with the design, which I will not elaborate on in this review.