I have been and I have loved it. There have been almost no instances of motion sickness for me. I play on the occulus rift. The level of detail and the things you can do in it are amazing. Although prepare to have several moments of panic and be sure your area is clear. I lost my sh!t a few times when a headcrab jumped at me out of nowhere. However, it is amazing to pick up a random suitcase and use it as a shield during fights =P
Also, I LOVE the gravity gloves. I am not very far in, only about 2 or 3 hours, but I plan to change that and binge it tomorrow.