I got the Waterpik showerhead to try and I love it! It feels fantastic on your skin and muscles from the different adjustments that you can dial it to.  The only problem I noticed is that some of the different strengths had leaks from the ones that weren't supposed to be working at the time of use as the one you dialed it to.  However, I have Fibromyalgia and Chronic pain, it felt fantastic on my muscles (especially my back) when I tried the different setting.  It is made of plastic, no metal, and you don't have to use any tools to tighten it.