In this task, you're given reviews from Amazon's products. Your task is to generate the Summary of the review.
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Question: Only one side has sound ! How do I get them replaced ?

Answer: Very dissipointed ! Pay $50.00 and it not even been inspected before shipped !

Question: Cordless unit caused the GFI and trip and not the unit will not charge at all.. Dead.. Nice unit, easy to use takes two tanks with of water to do the job, one for bottom and one for top teeth. NICE UNIT if it was working. I will be contacting the manufacture for the 2 year warranty.

Answer: Update. Unit was replaced by factory. Works great good feedback from Dentist.

Question: This review is more for the seller than the product, I love the shakes. I always order two cases at a time and last time I only recieved one case. I contacted the seller and didn't even get a response.

Answer:
Great product, poor seller with no customer service