They give an amazing sense of presence, but there are are reasons the Oculus is just a devkit at the moment. The DK1 can be nauseating for some, and the DK2 works with a very strange screen resolution (Effectively it’s a portrait format screen turned 90 degrees, making it difficult to mirror to conventional screens)
I used to have a DK1, and one of my favourite things was the quadcopter videos made for it on this youtube channel. Give it a go if you have one, just make sure to lean your head back against a wall or something, or you’ll probably get sick really quickly.
I’ve not tried Valve’s new one, which apparently does head tracking down to a millimetre, but a friend did and said “You know that feeling when you first tried an Oculus? It’s like that, but, again”.