Awesome product! Sometimes it's a little scary purchasing non-OEM AC adapters, because you don't know if they can provide clean power at precise voltage and adequate current for your device. Well, surprise! This one is awesome! Power is clean, voltage and current exactly as advertised. It has sufficient headroom that it doesn't get warm under normal charging, regardless if the laptop is turned on or not. I noticed when running an external usb hard drive the adapter does get a little bit warm but still not enough to be of concern. My only issue is the seller didn't ship this in a box, but a small padded envelope which was crushed in transit. Device works just fine though.