Picked up a pulsar challenger gs 1x20 night vision unit with Dsa from pax gun in archway last week. The unit is very compact and light and nicely built. It has a wide angle infra red light built in. Quite versatile as you can attach it to head mount and use it as a gogle or have it attached to your day scope with Dsa Which is sold separately. Monoculor and Dsa worked out around £285. Alot cheaper than Merlyn with Dsa. It comes with three years guarantee for peace of mind, I think the guarantee and price difference swinged it for pulsar for me.
Upon opening the package and looking through the scope I was quite impressed with the unit. Nice and clear, even though I wear veridical glasses I had no problem focusing the unit. The built in ir had a limited range being a wide angle eliminator I could see out to 10-12 meter after all it is designed for goggles opposed to long rang viewing. I was reading about these unit that you should use them with low magnification scope. I have recently bought a Mtc viper 6x24x56 and mounted the challenger to the back of the scope. I was disappointed that I couldn't see a thing. I knew that with magnification not Alot of light can get through but not being able to see really cheesed me off. I tried it with a different scope. My old mount master 4x12x50 and result, I could see but not as good as I wanted. I knew that I needed a extra ir source, after doing some research and asking you guys for some help ssome one recommended a n1000ap ir laser which I got it delivered by baldie from Hatfield. After mounting the challenger to the back of my viper and attaching the laser I was gubsmacked. It really made a lot of difference. On maximum magnification I'd x24 everything was clear at 30m. Tried it at a tree out to 50m it was fine. Some trees out 100m still nice an bright, when I tried to focused out to 150m to my supprise it iluminated rather well on the maximum magnification. On lower magnification of 10 I could see out to 200m.
Overall both challenger and n1000 complimented each other quite well and well worth the money I spent. Around £650 for complete outfit (Mtc viper+challenger+Dsa+laser).
Alot cheaper than dedicated night vision with 4-6 times magnification. The only drawback is the stock is too short but on the plus side I have a decent day and night setup.
Thanks for reading, if you need More info pm me.

Toni