So, who is she?
After reviewing a number of reports that are summarized below, it seems Ms. Burwell is a widely-liked and experienced Washington insider. She has a Clinton-Lew-Rubin pedigree and possesses considerable economic/budgetary credentials. Most of all, has the best chance of anyone of getting confirmed by a fractious US Senate.
The bad news is that she doesn't appear to have any significant experience in health care or with health insurance. Whether her past with McKinsey or as a Met-Life Board member will help her collaborate with the state-regulated commercial health insurance business is an open question.
Onto the summary.....
Ms. Burwell is the current Director of the White House Office of Management and Budget (OMB), where she has served since April of 2013. She's described as genial, a liberal who favors social programs, is willing to take on spending-wary Republicans (with government shut-downs, if necessary) but isn't especially ideological when it comes to managing the budget. Her nomination to OMB also helped quell criticism that the White House was dominated by males. She was confirmed by the U.S. Senate 96-0.
Her 96-0 vote getting track record makes it far more likely that Mr. Obama's nominee will survive what will likely be an intensely partisan process.
Here's Ms. Burwell sticking to her Obamacare talking points, even if it means glancing at some notes to make sure she's got it right: