The reservoir is not big enough. I cannot clean all my teeth without filling up. It is a pain in the ---! Holding it upright and wrapping your fingers around the bulky handle - not good.
My WaterPik works well. So did the last one. I just hope this one doesn't die almost immediately after the warranty period is up, as the other one did.
I was disappointed in this water pic. I have an old one. I bought a new old to replace it with. The cordless one sounded great. Well not so good. It will not fit under my bathroom sink and it holds very little water. The pressure is not good either. I am sure other people like it but it just did not work out well for what I wanted.