This was the first 'nice' lens I bought when I started with 4x5, and I quickly figured out that I like wider focal lengths...especially since the ground glass on my BJ Press camera is slightly off and nailing focus at 150mm is freaking tough. Now, I'm finally getting around to selling it!
Everything's working well - shutter speeds are good, no problems with the aperture blades, etc. The only issue is that both the front and back lens groups have some Schneideritis (Fujitis?). For what it's worth, I bought this from UsedPhotoPro rated as "Good."
Judging by the location of the lettering and the Copal shutter, this is not actually a Fujinon-W 150mm f/5.6, it's a Fujinon-NW 150mm f/5.6. This has a newer air-spaced design than the Fujinon-W, 224mm coverage, but perhaps more importantly, is EBC multicoated. Source: subclub.
I have one already and use it all the time, it's an almost permanent fixture on my Technika V.