I have had my Rift CV1 in my sweaty mitts for a couple of weeks. It is hard to put into words just how amazing this technology is. Despite the relatively low resolution (compared to modern monitors), the feeling of actually being there in the cockpit is simply outstanding. Looking around is so smooth and natural. It makes my Track-IR seem like a device from a previous age.
I just flew the first two missions in the Huey campaign. I always found the Huey to be a handful, but when flown with the Rift, it becomes far easier to control. You can almost feel any sideways slip or small changes in motion. You can see how far off the ground you are because you now have real depth perception.
There are of course some downsides , ie the aforementioned resolution, difficulty in reading some of the smaller text, and using the keyboard. Looking at the overall picture though, the Rift (and I am sure the Vive ) bring so much to the table when it comes to simulation. If you are still on the fence, then I hope you take the plunge. There is no going back once you try it.