I've used the version 3.0 of SilkyPix, bundled with the Lumix G1 micro4/3 camera, since 2008, and it's still my primary raw converter. The image quality output by the converter is fine, and I find myself doing almost everything in SP except clone stamping (which I rarely do to a digital file).
I'm no computer genius, so if I can manage good files from SP, I'm certain that others can. One thing I do know that takes some adjusting to is the little "busy" symbol in the lower right hand corner of the software. When you open up a full-sized view of an image, wait until it's fully rendered (the busy symbol is gone) before doing any adjustments to your image. Conversely, wait until the busy symbol is gone before developing to TIFF or JPEG.
Now, it's also possible that the version of SP bundled with the X100 may be buggy. But the one for the G1 works fine.
~Joe