If the shutter speeds are correct and there's no fungus, cleaning marks or anything else wrong with the lens - I'd say 'Go for it!'
The 150 CF is an awesome lens, some people claim it's not as sharp as the much more expensive (and rare) 180 CF - but acutally there's not that much difference. It's a great focal length for portraits and also quite usable in the field - even if you use it with bellows it still performs rather nicely...
You should definitely consider buying a lens shade, or even better: the proshade, because I've encountered some (minor) lens flare.