Pros: Estimates cost, menu is better, etc. Great for figuring out how much it costs to operate something in your house.

Cons: *no 'backup battery': you lose all the information as soon as you unplug it. *no backlight: fairly difficult to read what it says (you have to crouch down on the floor to read it, or buy an additional extension cord). I find myself using a flashlight to illuminate the screen.

Overall Review: better than the 4400, because without the cost estimation in the 4600 you have to run an excel spreadsheet to get that.

Pros: Lots of connection options (local USB, wifi, ethernet); lots of streaming apps (netflix, hulu, etc); simple connections to streaming server (Plex, Twonky, etc); plays literally every format of video file I can find.

Cons: Slow menu system with lots of lag and waiting. Everything works fine, functionally, I just can't be in a hurry when I want to find something to watch.

Overall Review: Yes, I have the latest firmware installed. I feel like I'm using AOL sometimes. When I hit a button, it takes anywhere from 3-10 seconds to execute it. When I'm used to xbox, or even my Wii, they can click through faster than that!

Pros: Easy to juggle multiple hard drives without taking your desktop apart. Bought to make it easier to use my hard drive on multiple computers instead of an expensive network hard drive.

Cons: hard drive seems a bit exposed, and worries me about dust over time. Then again, the inside of my desktop probably sees more dust than my desk :)

Overall Review: Will accept any hard drive size simply and easily.

Pros: Easy Connectivity, Good Battery Life, Small and Lightweight

Cons: Off/On Switch is longer than the rubber pads on the bottom of the mouse, so it doesn't sit flat on the table. Needs to have taller rubber pads or just put the off switch somewhere else.

Overall Review: Bought together with Targus USB Bluetooth Adapter and have occasional problems connecting. Have to unplug and replug usb device to regain connection.