This test is easier to take than the SAT though maybe not easier in actual terms. This is because the SAT mixes the difficulty of the questions so you can get flustered on encountering something difficult early on, whereas for the GRE, if you keep a cool head, especially early on, things will go fine. Oh, also: NO BUBBLE SHEETS. I hate those things.
The material itself is about SAT standard so you can know what to expect on that front.
I studied on the train on the way to the test centre and got a 1530. Might have been a fluke but honestly, I knew there was no way I was going to score below a 1500 under any circumstances unless I showed up drunk or something.
On the other hand, there was that 3.5 on the writing section.
Didn't seem to count against me during applications though, even though I'm in the humanities, so @Orangey is right, they look for a certain base score which is actually pretty low for most places. Might be higher for the really top schools but not by much.