If this is the same as Ultimate Fighter, I actually have become hooked on it and it doesn't seem all that dangerous, since the refs are pretty quick to stop a fight when someone stops defending.
Ultimate Fighter got me into Gracie Jui Jitsue. Its the best sport around, and boxing fans are petrified that it will overtake boxing, and it will.
Its safer than boxing,
More entertaining than Boxing
More versatile than Boxing or Wrestling