Given an English language product review, determine if it is a Good Review or a Bad Review. A good review is one where the product's review has positive tone and Bad review is one where the tone of product's review is negative.

I've had these filters for about a month. I can notice an improvement in air quality, but no changes regarding our overall health. However, we use the filter everyday, so it's not like we're breathing cleaner air. This isn't to say that there aren't other better ways of providing clean air, though. Still, it seems worth it and we love being able to feel good knowing that we're doing something healthy with our money when using this..
Good Review

Great product. Easy to install. Gave me hours more viewing for my TV. This product improved watching HD programs with my new Samsung HDTV.
Good Review

I got it for my son and it's not working after about 5 mins. It plays the music but doesn't turn on or charge. The screen is also too small so he can't even look at it. He won't be able to use it. I'm guessing most products are like this, when they send you a product its obviously defective, either they've used old stock or something else went wrong too. And because they're Chinese things take a little less time than usual.

Bad review