We just uploaded a review video about L3 filmless white phosphor and compared to the other devices we've had - PVS-14 with 11769 Photonis Echo 4G white phosphor and BNVD-SG with 11769 ITT/Harris Pinnacle HP+ green phosphor tubes.
I've been debating for the last 1-2 years to purchase a device with one of these tubes in it. The cost versus performance I wasn't convinced was worth it and I'd not used a device with these tubes in it. After getting the Photonis WP, the wifey and I both really fell in love with the different phosphor color. That paved the way to start selling off some of our gear to go towards funding the L3. I was slightly nervous of the results.
After getting and using the first PVS-14 from N-Vision Optics with the zone 3 blemish L3 filmless WP tube I was immediately astonished in it's performance. Honestly, I was pissed at myself for not doing this sooner. The clarity is excellent and far better than the pinnacles. In brighter conditions the Photonis was very similar to the L3 although the phosphor color is slightly darker blue.
All three of these different makes of image intensifiers do their job very, very well. L3 filmless is much more expensive and definitely worth it if it's within your budget. It's not going to do anything astronomically better than the others in terms of letting you see in the dark but it definitely does it better.