Back in the early 90s I experimented with tvp quite a bit. Some types are better than others. It was always obvious to me and the girls that we were eating tvp or food made with tvp mixed in it. I was able to increase my intake but the girls just couldn't keep up. Then I got an ulcer and had to watch what I ate for a while. TVP had to go until I could heal up enough. I haven't gone back to it since.

To quote a famouse Australian character, "yeah, you can live on it, but it tastes like $^&@."