3 in ONE!!
All apple trees require cross-pollinators (2 different trees of different varities.)  Not this one!!
There are 3 excellent varieties grafted onto a single tree:  Odyssey, Goodland, and Harcourt.  
Only one tree is required for harvest.
Yes, they are more expensive than our other apple trees but... for those who want to harvest apples in a smaller yard, this is the answer.  Also, these trees are considerably more advanced.  Larger and ready to produce!
Last fall, we witnessed a significant harvest from one of these trees... almost too much to keep up with!  
 
Unique and beautiful apples.  All-purpose fruit.  Fresh eating, canning etc.
 
These trees come in a 10-gallon pot and have a 1" caliper