Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not so great

I didn't buy this from Amazon, but mine is just not useable. As others have noted, it is quite a bit larger than I expected. Also, it seems to charge, the lights come on normally, but it will not charge anything. It won't work on my iPhone thru the USB port, and the AC port won't power an external hard drive.Mine may just be defective, but since I only paid $11 for it, it's just not worth pursuing a repair or replacement to me. However, just beware that it may not provide enough power to charge anything other than basic cell phones.