It depends how you present yourself.
I'm a former emergency RN myself, now an M1. As volunteer essay reader last year, I read quite a few by people in various healthcare fields, including nursing. I noticed that many people, sometimes unintentionally, sound hypercritical or negative about what they've experienced so far in healthcare. Spinning stories about doctor mistakes, talking about how you saw a doctor handle a situation and just knew you could do it better if you were a doctor, talking about the flaws you see in practice and how you just know you wouldn't treat a patient that way...etc etc you know what I mean. My examples are glaring to drive home a point, but you'd be surprised how this can come out subtly in choice of language and essay framing.
Same goes for ECs. Descriptions of your work that makes it sound like you're unteachable will sink you. Also a problem that a lot of people have and again, it can come out in subtle ways (even if you don't mean to sound that way). Same goes for interviews. The experience of working in healthcare is valuable. In my interviews I was asked often to talk about my time as a nurse and what I've learned from it, and I could tell by the way some questions were phrased that they were gauging exactly what I mentioned above -- trying to figure out if I was teachable. Did I think I was a know-it-all already or was I someone who would incorporate past experience into learning. What exactly did I see as the differences between nursing and medicine and why did I decide to pursue the latter over the former.
I got the impression that most of my interviewers felt that the RN experience was an overall positive thing. But as the above poster has mentioned, be a well-rounded person. Don't make the entire application around you as a nurse, as you are far more than your job. While I was asked about it frequently, nursing wasn't even the main focus in many of my interviews. Though it's an important part of you, they want to see a whole person who has other interests and strengths besides what comes from one job.
Best of luck to you.