Even though they are beautiful and  unique, I did build them with the intensions to use them.  With just a few minutes of care, they should last you for years.
I use a salad bowl finish on the utensils.
The trays, unless you want another finish, are finished with a custom finish that I blend myself.  It's a hand rubbed oil finish that brings out the grain of the wood.
The cutting boards are finished with butcher block or mineral oil.  This type of finish doesn't hold up as well but is easy to reapply.

• DO NOT put in a dishwasher.  Hand wash only with water and a mild soap.
• If utensils begin to look dull, they can be buffed or lightly sanded and refinished with either oil or a salad bowl finish.  I wouldn't suggest regular polyeurathane.
• The trays only need to be cleaned with a lemon or orange oil.  They are water resistant, but not water proof.  Prolonged exposure to water will cause the wood to discolor.

If you ever have any questions or need repairs, feel free to contact me.
I do sell the trays with a lifetime warranty, except for water damage.