Given the task definition and input, reply with output. In this task, you're given reviews from Amazon's products. Your task is to generate the Summary of the review.

App was painful to finally synchronize after a month of use this happened and has not been able to fit back, really dissapointed about this happening to an almost brand new watch, bought as a gift not satisfied at all of this product.
Don't buy won't last long, giving issues after a month of use