I've bought a couple of random ones on Amazon before. From my experience the bad reviews are almost entirely written by some seriously tech-impaired people that are confused by why accidentally turning on their PS4 via the controller changes their TV input, or something silly like that.
At the end of the day, HDMI outputs a digital signal so you won't really get image degradation. Just make sure if you have a 4K screen that the splitter is 4K compliant, and if you have a surround sound system then check that 5.1 surround sound channels go through the splitter, or better yet, it might even have a separate digital out for audio (e.g. one of mine has a toslink jack)