I am a PR and was in a Dui situation last year. My trial finished a few weeks ago and I was acquitted. You can renew your PR card but cannot apply for citizenship. Getting convicted can have a major impact on jobs and travel. All I have learnt from this is to never ever drink or drive. It can destroy your and other lives.
My limits were low right around 0.09 and that helped. Secondly what helped was getting a good lawyer. Do your research, not what just google recommends or the so called DUI specialists. Get an experienced and reputable Criminal lawyer. I know that it can be very expensive to get a good lawyer, but a conviction can have a huge impact on your life.