Instruct: Classify Amazon reviews into positive or negative sentiment
Query: mattress is lame

This co-sleeper is just ok. I do not attach it to the bed- I use it the same way you would a crib. It's a little tricky to assemble and my husband hasn't had to break it down for any reason. My main complaint is the mattress... it's way too hard. My husband found an quilted pad online specifically made to fit this bassinet but it didn't do much good. The Arm's Reach website has an organic mattress for $120 but that's crazy expensive! I ended up carefully folding a microfiber throw to fit over the mattress and then covered both with a jersey fitted sheet. While it's not the best solution, it's the only way my baby will sleep in this bassinet.I wish I would not have registered for this product.