Is this set worth it over a smaller Zwilling set?

If you need steak knives, shears and a bread knife in one purchase, the breadth justifies it. If you mainly use a chef's knife and a paring knife, a smaller set or open-stock knives give better steel for the same outlay.

Are the knives really dishwasher safe?

Zwilling lists them as dishwasher safe, but heat and detergent dull edges and degrade plastic handles over time. Hand washing and drying keeps them sharp far longer.

What is the difference between the stainless and carbon steel blades?

Most knives in the set are stainless steel for rust resistance and easy care. Carbon steel takes a keener edge but needs drying and oiling to prevent staining.

Does it include a sharpener and scissors?

Yes. The set includes kitchen shears and a knife sharpener along with the block and 18 knives.

How much counter space does the block need?

A 20-piece block is large and needs a fair stretch of counter or a deep drawer. Measure your space before buying; smaller blocks hold the same core knives with less footprint.

It works well for a first home or a couple setting up a kitchen, since it covers everything at once. For an experienced cook, open-stock forged knives are usually the better gift.