The reviewer falls into the same trap as others regarding repair equipment like this; they think it's too complicated and durable and want to compare it to their hobbyist equipment. They're forgetting that the official equipment is meant to be used thousands of times, by minimally trained and overworked staff, with the least amount of damages. Hence the whole setup for each phone model have a special phone cradle, that has an RFID chip that sets up the recommended heating temperature and time, because the tech is going to put the phone into the heater and then walk away to do something else, and doesn't want to come back to a damaged mess like if they used the "cheap" hobby heating plate for too hot or too long.
One of YouTube comments is like "whoa, it costs $100 for each new heating plate, what a ripoff" which is absurd when you amortize that cost over the hundreds of phones it will service and how much each screen costs.