I invested in a #4 Lie-Nielsen plane. This plane is different in a few way from the traditional Stanley/Bailey plane. The number one difference is that the frog holds the plane iron at a 50 degree pitch as opposed to the 45 degree angle found on most Stanley/Bailey planes. The higher pitch is referred to as the York or Middle pitch.
The steeper angle helps reduce the tear-out that comes with difficult woods. Here is a great blog about the whole issue with planing and potential for tear-out.
I am working on medicine cabinets for our two bathrooms. I chose quarter-sawn white oak to match most of our Arts and Crafts style furniture. I included a picture of some of the shavings from the oak pieces that make up the doors. Call me a sucker for wispy thin shavings of wood, and this plane is a champ at making them. I like using this plane on this oak because I get tear-out on quarter-sawn wood from time to time and this plane really helps.
I have several planes from several manufacturers. Some are new, and some are a hundred years old. I use a number of them on my projects. This plane however, is like an old friend. Although I have not possessed it a long time, it simply fits my hands so well, and is such a pleasure to use.