Since it allows one per member instead of one per household, couples should be able to open two of these for a $20K maximum deposit. That would earn about $233 more than what you would earn in a 4% account over 7 months. I used to compare these types of CDs to 5% accounts, but after the recent massive Fed rate cuts, 4% is more reasonable.
Membership is open to anyone who lives or works in Washington State. Please refer to the credit union's Membership page for more details. Membership requires a minimum deposit of $50 in the Primary Savings Account ($5 for those under 29).
Branches are located in Seattle, Redmond and Tukwila, Washington. The credit union is federally insured by the NCUA (Charter # 66349). It has $231.8 million in assets and 28,006 members.
Credit for this find goes to FW member DeGlass who posted info on this special at this FW thread.