Fantastic app in so many ways. Things like JRiver (and of course MadVR) have pulled ahead in recent years, with their handling of HDR tone mapping (like mapping HDR2020 content down to SDR gamma for a particular display's peak output capability, like 100 nits or what have you, and being able to retain 2020 color in the process) and aspect ratio control (automatically detecting black bars and learning to place 16x9 content into the "center" of a 21:9 screen when it occurs in a 2.35:1 movie, etc.
But for what it is, Infuse does a good job for people with flat panel TV's that have good HDR capability. Like all apps relying on the Apple toolkit, the mapping of color isn't completely accurate, but it is seldom off too much.