Well I have used tree stands for many years. I have fallen once but was not hurt. I almost fell one other time. That was when I went and got a harness and have used it ever since.
One of my platform stands I built railings on the thing so I was a little safer. One other platform stand I mounted a tent on the top of it and that was a great blind. Plus I have a couple climber stands, but lately .. I have been using a ground blind more and more.
You will like tree platforms. But a harness is a good thing.