With this option your order is moved to the top of the list, and will be processed either the same business day or the next business day. The shipping time will still be according to your choice at the check out. 

For example, if you choose First Class, and RUSH MY ORDER, your order will be shipped right away, but will still take up to 6 business days to arrive, depending on where you are. And if you choose a 2 Day Priority for your shipping and RUSH MY ORDER, then your order will arrive in about 2-3 business days, depending on the time of the day it was placed.

Normally orders are shipped in 3-5 business days.

I would recommend checking with me first, before adding this option to your order.