Instruct: Classify Amazon reviews into positive or negative sentiment
Query: It was a great idea!

I had a built-in vibrator in my last 'water' bed and I loved it! Now I have an adjustable air mattress and I thought I would try this product in it and enjoy falling asleep surrounded by gentle motion waves..... well, it didn't work well at all. It was very noisy and the vibrations are very suttle through the air mattress and do not travel up your head and down your feet. I would probably like it if I had another water mattress, but not air. I returned it. I'm not sure what it can do in a spring mattress, might be worth the try.