"okay with us" is correct and can be used in written English.
Example: "We are all in agreement about the project proposal. Is this plan okay with us?".
This is entirely okay with us.
Governor Northam is not okay with us," Annan said in an interview.
"It's a huge impact if it reinforces the Saudi bombing campaign in Yemen, and also the signal that it's okay with us.
Auditing: We observe that students who take the course for a grade participate more and get far more out of the experience (even among those who say they are different!), but pass/fail and formal auditing are okay with us too.
In fact, it is nearly identical to the international Galaxy S II — which is completely okay with us.
Let us start off by saying that anything that gets topped with this much cheese is a-okay with us.
We just don't have that certificate, and that's okay with both of us.
"Okay, come party with us first and then we'll get you a wave," they said.
Being okay with not knowing allows us to be creative, open, and willing to live in a state of wonder and possibility, like children do.
I think most of us are okay with preparing students for these kinds of tests and helping them become good test takers in order to get past these hurdles that, like it or not, do and will exist.
