It was very easy to install with the supplied equipment. The only tools required were a wrench to secure the plumbing connections and a screwdriver to remove the toilet seat. 
I thought that spraying cold water would be shocking and uncomfortable, but it is actually quite tolerable. 
The water stream is very powerful, so you must be careful when turning the knob to initiate the water flow. It may be my particular building's water pressure, but I find that I barely need to turn the knob at all to get the desired pressure. However, the control knob is a nice feature as it gives you the ability to adjust the pressure to provide the perfect stream. 
I was also impressed by how clean it actually got my back side. I figured I might still need to use toilet paper to finish the job, but I found that it got me so clean that using a towel to dry off was all I needed.