Yes some of the finer detail is lost but you have to account for the fact that this is one of the grainiest LD's I've encountered and you can't remove this amount of grain without a little damage, a still image cannot really show the difference between unfiltered and filtered so check this out:

BR_LD_BeforeAndAfter.mpg - 19mb, mpeg2 3500kbps avg, AC3, PAL anamorphic

The difference isn't so noticable on a computer screen, to really see how well it cleaned up you have to watch it on a tv.