Definition: In this task, you're given reviews from Amazon's products. Your task is to generate the Summary of the review.
Input: The lights worked great for a couple of months, but then quickly started dying out one after another. The product supposedly has an 18-month warranty, but I was unable to contact the seller: the email and phone number on file with Amazon belongs to another business of the same name! Eventually, Amazon kindly provided a refund, but I would not recommend buying this product in the first place.

Lights stopped working after a few months, and unable to contact seller.