Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A good unit

I bought 3 of these for my kids back in Aug 2006. I think 2 still work, but the one that failed got wet.It works quite well. I like the many levels of volume, unlike my cell phone.Sound quality is good (though not as good as Cowon D2).The menu is reasonably navigable with adequate features.The FM radio is nice (I still use that at the drive-in movies)It is very convenient to just plug in like a USB drive and copy music onto it.In fact you can use it simply as a USB flash drive if you need to.The biggest complaint I have is that this device really only likes 1.5V that you get from alkaline batteries.Battery life is not that bad for alkaline, but when I bought this I intended that I would use NiMH rechargeable batteries, which are only 1.2V.So those batteries only work a very short time, if at all, before it considers them exhausted. Basically I cannot use rechargeables.