Yes! I rode in an E195 recently and I was kinda dreading it because it's a much smaller plane than a 737. I was so pleasantly surprised how roomy the cabin was. And how quiet and convenient. There was even a little holder for my tablet.
In my case it was not more expensive, no. But I was flying in Europe. Not sure about the US.
They just use them for the quieter flights where they have trouble filling up a 737.
I was dreading it because the last time I flew on an airliner this size it was a 717 and it was horrible. Very noisy in particular (I was seated right beside the engine I have to say). The Embraer was really delightful and it has under-wing engines.
Here in the US basically all the regional airlines use them. Horizon Airlines is one that I know of specifically, and Wikipedia lists Sky West, Envoy Air, Mesa Airlines, Republic Airways, JetBlue, etc, etc. Many of them contract for the more well–known airlines like Delta, US Airways, and so on, so you could end up on an Embraer even if you don’t seek it out.
