A very convenient size. That's what the Lie-Nielsen Medium Shoulder Plane offers.Like nearly everything bearing Thomas Lie-Nielsen's name, the medium shoulder plane was perfect right out of the box. The casting was good; the machining was flawless and perfectly flat and square. The blade was ready to go, but a couple of honing passes gave me a feeling that I had improved upon the impeccable as-shipped quality.Put to the task of cleaning and refining joinery surfaces, the Lie-Nielsen Medium Shoulder Plane shines and brings a smile to the user's face. The size seems to be just right for this task. Squaring up Mortise and Tenon joints prior to assembly does not require the mass of a Jointer Plane, and that is how the Large Shoulder Plane can feel sometimes. The Medium Shoulder Plane allows the focus to be directed on the cut without the distraction of unneeded mass wanting to flail about.The shape feels very good in the hand, where the perfect 90 degree functional corners of the business end are complimented by gentle, comfortable radii where the hand makes its contact.Finally, the appearance accentuates the display when the tool is not in use. What Display? Well, naturally one builds a display rack to show off his planes. And among the bronze, ductile iron, cherry, rosewood, cocobolo and infilled ebony, the distinctive shape of a shoulder plane is a welcome sight. Like a row of chess pieces, with each assigned its unique role, the shoulder plane is unmistakable in its appearance and secure in its position of marked utility when called upon.Shoulder planes refine joinery and bigger does not always mean better. The Lie-Nielsen Medium Shoulder Plane goes places its big brother cannot, and does so with a feel that your hand says is "just right."