We want tinted windows, but not all for the same reasons. There are some key buying criteria that will determine which model you need.
The first purchase criterion is solar protection. The tinted windows will let in the light, but stop almost 100% UV and prevent dazzling.
There is, in addition, a better temperature regulation, since in the presence of a window tinting; about 80% of the heat of the sun stopped, against 20% for untreated windows. One can also be tempted by the tinted glazing, for better protection of one’s private life.
The glazing can then be reflective or opaque. We can use in exterior glazing to protect from neighbors a little too curious, or indoors to isolate a room.