Instruct: Classify a given review into positive or negative sentiment.
Query: Loved it, but defective

After trial and error with soothing and trying to get my baby down for naps and bedtime without crying and upset, I recently purchased the Sleep Sheep on the Go. Reviews had stated that the regular one was a bit large and we didn't feel we needed the heartbeat for my 16 month old. We love the sounds although the Whale recording is a short loop and not as good as we had hoped. The problem is that the one we received does not shut off automatically at the 23 or 45 minute intervalls. It also stopped working altogether and this happened the same day it arrived. I am requesting a replacement but we are disappointed in its workmanship as my baby just loves her Sleep Sheep!