I use one on a LF170 - they are very effective but you need tape the joint between filter and lamp to avoid light leakage. I found I got a better beam when I used the vertical filament bulb. You also need to be mindful that the whole unit gets hot as hell, so using it for prolonged period when static (i.e. no airflow around it) can cause problems.
I have used it with NV uits from G1 to G3 and digital - it's not as effective as a high end IR laser but a massive improvement on low end IR torches. The main problem is that it's a bit bulky to have lamp and IR device fixed together - I tended to use it in conjunction with a digital Ranger Pro NV spotter, using the lamp via a T-bar through the truck roof.
However you use it, the filter itself is of very high quality material and functions well.
A.