Unlike manufactured materials, wood products have natural imperfections which make them unique and beautiful. Unfortunately, a lot of people who order wood cabinets complain about these imperfections. Because wood is in a constant state of expansion and contraction, some hairline cracks may appear in the finish surface. Some parts of the wood are softer in composition than other areas and may absorb the stain more and appear darker. When cabinets are stained, many of the wood's characteristics show through including: the grain, pin holes, knots and mineral streaks.These marks are what give the wood it's character. It's also important to note that age changes wood as well. Certain wood, such as cherry, will continue to darken over time. This makes it pretty much impossible to match existing cabinets. Even if they have the same stain, they won't look the same. It's all about expectations. If you are expecting a perfectly smooth surface with no blemishes, you are better off going with a paint that completely conceals the characteristics of the wood. If you appreciate the natural beauty of wood, you'll want something with a stain that allows that natural beauty to show through.