I was surprised by how light the unit was, and it initially concerned me. But the DR-05 is an exceptional recorder. It is sturdy and well built. Buttons respond well. Adjust the settings correctly and it can record very high-quality audio. Downloading to the computer is easy. The included memory card can hold well over 30 hours of MP3 recordings. And the USB port doubles as an external power source (to provide external power you will need a USB cable that plugs into some powered USB hub).
You can plug an external microphone into the unit. Also, you can listen with headphones to what is being recorded while it is recording.
This unit can record in multiple formats, from MP3 to WAV, each at various quality levels. The display shows how much time you can record at any given setting.
With respect to the extras in this package, they are terribly cheap. The tripod is flimsy and only minimally usable. The cords work fine. The headphones are ultra-cheap.