I've used the TNVC PVS14 and 31, white unfilmed. I haven't shot with it yet, but I've used it for hiking, work, and driving a golf card. The white phosphor is a big improvement over the greens I used in the Army. It makes it easier to see and more enjoyable to use. The dual tubes isn't worth the extra cost at nearly 3x the price of a single. I can do everything fine with the single tube, and sometimes having an unaided eye is better in mixed lighting. The dual tubes could be worth it if you use it all night, use it for professional work, or drive a vehicle. Otherwise single tube is fine for most civilians.
I am concerned about digital night vision making my analog NVG's obsolete. Digital is still at early Gen 2 levels right now, but it is evolving quickly and it has the potential for color. Still going to be 5 to 10 years for digital to get close, but when it does the price of analogue NVGs will crater.