I had very good experience with the MSR MIOX. Twice using it the fields and I did not suffer any ill effects.

I even use the MIOX at campsite to treat water in big container before I using the water for showering. Try treating your bath water with other methods such as steri pen, tablet, etc. is not very feasible.

Recently, I am using the MIOX when I stay at hotels in 3rd world countries. Although some hotel do provide electric kettle in room. But the kettle is usually very dirty. So what I do is before I go to bed, I would fill up a platyus 2 litre bag with tap water and treated it with the MIOX. I will leave the bag overnight and next morning I will have a 2 litre of treated water for drinking.