"remained impressed" is correct and usable in written English.
You can use it when someone has experienced something and has been affected by it to the point of being impressed. For example: "John was impressed by the beautiful landscape he saw, and he remained impressed even after he returned home."
The current first selectman, Susan Dyer, said she remained impressed with the renovations, but lamented the dispute.
While we were none too happy with the insurance company, we remained impressed by the doctor: he had made our baby better and was compensated for it, all the while avoiding the hassle of dealing with insurance.
We remain impressed by the Hargreaves Lansdown business model but feel the valuation remains too far above our 900p assessment of fair value to be more positive of the investment case.
But some of them remain impressed on you, and they accumulate".
He added, "I remain impressed with the dignity, stoicism and discipline of the Essex crew" throughout their ordeal.
The Jets remain impressed by his poise and enthralled by his ability, and realize there will be tradeoffs on days like Thursday.
I've marvelled before at crowd-sourced translation projects in China, and I remain impressed by the impulse to watch — and translate — a foreign source as complex as these classes.
This is a movie that understands sub-cultures – that there are people willing to follow their dream and be among likeminded people, and next year, if all goes as planned and the visiting execs remain impressed, the awards may get broadcast on Gluten Free channel, which is part of the basic cable package in two different areas.
"Overall, we remain impressed by Lilly's ability to meet or exceed earnings expectations despite challenging conditions," said CSFB.
And I remain impressed that for less than the price of a cup of coffee, I can pop a plain envelope into a box and have confidence, more often than not, that it will be delivered halfway around the world.
It's not a great situation, though I remain impressed with how well the show is handling things despite these major losses so far, as season 9 has been the best season of The Walking Dead in several years under the direction of the Angela King.
