DCU is my "bank." I use them for checking, money market, a credit card,
and they have an ATM in my office building. I have never purchased a CD
from them (or from anyone else), since I prefer Treasuries to avoid
state taxes, and for their greater liquidity.
My main gripe with DCU is that they generally want you to have your
paycheck or social security direct deposited to your "free" checking
account ("free" means they don't pay interest, but also don't generally
charge any fees) to get the best deals. For example, with direct deposit
you get "free" checks, as long as you take their carbon-copy style checks
(which I dislike). They usually offer better CD interest rates with direct deposit
to your "free" checking account, though it looks like they are not requiring
that for this 6% deal.
A few years back they had a bug in an advertising popup on their website
which instead of bothering me once per month as their customer service
claimed was intended, bothered me every time I used their website.
For a "Credit Union" they are very commercially oriented, spending a fair
amount on advertising.
If you download things into Quicken/Money/etc you will find that you can
login to their website and manually download one account at a time using
"Open Financial Exchange" (OFX)
"Quicken Financial Exchange" (QFX)
"Quickbooks" (QBO)
or
"Spreadsheet" (Comma Separated Values)
However, they do NOT support Quicken's "One Step Update" so you will
need to manually login to the dcu.org website.
Bottom line, most of the people in my office use them. They are OK, but
certainly not thrilling.
I hope that helps.