Definition: In this task, you're given reviews from Amazon's products. Your task is to generate the Summary of the review.
Input: Bought this blender for making smoothies out of fruits and vegetables. I was really happy with it at first but after only a couple of months the jar cracked. I called customer service and they said they would replace it but they never did. I wanted to like this product but it just doesn't hold up under normal use.

I was really happy with it at first but after only a couple ...