It has hooked me in much quicker than 4, but then I prefer the setting. I sat on 4 for nearly a year before I went back to it.
That is possibly the best way to do it as it has been patched a lot beforehand. You can see the odd bugs and weird goings on in this and its quite funny in places. One funny I saw last night not sure it was meant a cult guy I was about to shoot just got thrown up into the air by a bear that just spawned from nowhere. He landed in the back of a truck, jumped into drivers seat, ran over the bear then crashed into the fuel truck and both blew up. I was killing myself laughing.