Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Lovely sounds, a bit of a loop problem

A great little machine for those who enjoy some calming sounds at bedtime. My favorites are Summer Night and Ocean Waves, though the looping is not quite completely seamless. It doesn't bother me a whole deal though, just wanted to say that in the interest of disclosure. It does help me sleep well, but I do stay away from the Heartbeat sound, as it's rather creepy and makes me think of thrombosis and embolisms, probably a great thing when prepping for your MCATs but not so much when trying to sleep.UPDATE 12/29/12: Another reviewer mentioned interference with cell phones. Drifting to sleep last night, I was suddenly startled by something that sounded like a stampede of Japanese giant hornets. Yep, it picks up cellphone interference. LOUDLY. Recommend keeping cellphone in another room while in use, if possible.