Had one and returned it
Mine had to go back as the screen was DOA, and no replacement was available so was refunded. The rest of the machine was OK as I plugged in to an external monitor. It's a decent spec for the money, though you have to be very careful you get the exact spec as there are other N56VM models with different screen resolutions, etc.
There are a few issues with the machine I found in the short time I had it. The harddisk is painfully slow, especially as I'm used to a SSD, so budget to replace that (it's easy enough to do). The keyboard is OK, but could do with being backlit and it's too easy to touch the huge trackpad with the heel of your hand, sending the cursor flying off from where you thought you were typing. While there are 4 USB3 ports, there's no PCI-E port for future expansion, so you can forget adding a cheap thunderbolt card or whatever to keep it current, and there's no option of a docking station, except the slightly dodgy USB ones. You can use either two external monitors (VGA + HDMI), or one external monitor + the built in screen, but I don't believe you can use all three at once, which is irritating and not so good for development. Battery life is poor under load, and the power brick is huge. Also, curiously it says to never turn on the brick at the mains without first plugging in to the laptop, which makes you think it's a very cheap design.
So a good basic spec let down by details.