Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Did not work for me, would have given more stars if shipping was refunded

Bought specifically to amp up water pressure as advertised. Did nothing of the sort for my shower, just spread our low pressure over many nozzles with tiny spray streams and it actually really tickled my head and face. They were great about accepting my return request and I'm guessing if I had mega shower pressure this baby would be great, but...then...I wouldn't need to look for a product that is supposed to increase pressure.I wasn't expecting to not get my shipping cost back, since I had to pay 10 bucks to ship it BACK to them, and only got 80 dollars in return instead of the total 89.95 (w/ free shipping) That I paid for it....so for that SNEAKY move (and for it plain not working for me) I give it a one star.It is kinda cheap feeling due to plastic but it really seemed like it was soundly constructed.