Still use Google out of habit I guess. Bing as a search engine option is not new for me since I have been able to use it with Glims for a long time. With Glims I can use virtually any search engine I want, including MRoogle.
Been using Bing at work as it is my default search and I kinda like it. I changed my chrome browser to Bing as well. I have gotten so used to Chrome that I am having a hard time switching back to Safari.