This was difficult, as we truely believe there are no disadvantages to fitting blinds but we managed to think of a couple areas where a high-quality set of curtains may have benefits over window blinds.
Excellent blackout blinds are now available to buy especially Perfect Fit blinds for uPVC windows and Velux blinds. These types of blinds are fitted tightly to the window frame to prevent light from getting in. Other types of blinds will not give your room a complete blackout in the way that high-quality curtains can. This is usually due to the small gaps between the blind and the window frame.
Fitting a blind to a window will keep heat in your room and help with energy bills, however, a thick pair of heavy curtains will do a better job at insulating your room.