Instruct: Classify a review into positive or negative sentiment.
Query: Wish I could give it negative stars

The avent is a piece of junk. Like one of the previous reviewers I have also been having problems with the star valve popping out, disrupting the suction of the pump. Whenever this happens I'm invariably in the middle of letdown and have to stop what I'm doing and spill milk all over myself to get the dumb thing popped back into place so that it can eventually slip out again. If being relaxed is supposed to help women with their pumping then I'm surprised I've been able to pump more than an ounce, since I'm usually frustrated and angry when using this thing.Get the medela if you can. It's less expensive and it actually works as advertised.