Instruct: Classify Amazon reviews into positive or negative sentiment
Query: After 6 months, it's unusable!

I'm so disappointed with this bike after the positive reviews. I bought it based on these reviews. It's very flimsy and after just a couple of months developed a 'cranking sound' on every cycle! The seat and whole back portion cranks! I even got complaints from my neighbors! So much for the 'quiet' this bike promised. I bought this one to use when my baby was napping, and now 6 months later I'm left with a bike I cannot use because we cannot figure out where the noise is coming from!!The noise wakes up the baby so it's now useless.Last time I buy something like this from Amazon as the returns window was only a month after purchase and there is a restocking fee. The bike worked fine for the first month or so, before this noise started.So, if you are looking for a bike that will only last one month or two before falling apart or becoming terribly noisy, then it's for you!