Tomm,
You've picked a great plant, but there are unfortunately a few mistakes on the tag. the proper name of the plant is:
Bc. Maikai 'Mayumi' HCC/AOS
Note that both the grex and the cultivar name were misspelled and the award indication omitted. Tsk, tsk, tsk on the grower/nursery/whoever made out that tag.
Here is a link to a pic of the flower.
I had one of these, the same cultivar, for years until i moved down under. i got it for $5 at an orchid society meeting where they did a potting demo and divided up an enormous specimen of one of these. When I got it I think my piece had only 2 pseudobulbs but had probably 25-30 only about 5 or so years later. The plant was awarded in the 80's, if I remember correctly, and the 'Mayumi' cultivar was extensively cloned. It should do really well for you and give you lots of flowers and growth.