"Thunder"?  That term is a little loose.  Good pressure for ninety jets and rain style...but this thing isn't going to pound the soap out of your hair.  We will keep it because its okay...but I would not say it is really high pressure.  But it is a LARGE head and provides good coverage.  Some people really like the feeling of the dirt and sweat being sprayed off their body...I am one of those people...this won't give you that feeling.  But the old shower felt like 25 guys with prostate problems were peeing on me, so this is definitely a step up.