Instruct: Classify a review into positive or negative sentiment.
Query: works for a short time

My son is only four months old and I didn't even start pumping until he was 2 months old to start storing some milk. I usually pump about four times a week and I went to pump this morning and there was no suction! Spend the extra money and buy a better pump. I've heard a lot of good things about the whisper wear pump and ordered one of those today to replace this pump--medela doesn;t even make a car adapter for this pump