I don't think we'd go with trichlor.
I've read about drying your skin out, but that can be as much a function of the spa removing all your skin oils I would think. .
My dealer offers bromine but never recommends it, we use dichlor powder with a trichlor floater set to 1 opening. 1/4 cup of baking soda per week and add 1 tsp of dichlor every other soak. Water is beautiful, 3 kids, my wife and I use it daily. Spray out the filter once a week (2 minutes) and put it back in. NO WARRANTY issues either.
Ray