firsthand as she toured several enrollment centers in the d.c. area. washington state's health care exchange had to shut down for a few hours. there were also a few surprises. knoll, who just turned 30, found out her premium is going up. >> they're a lot more expensive than what i had before. >> reporter: roughly how much, do you know? >> more than $100. so about $125 more. >> reporter: a month or year. >> per month. >> dan mendelson helped build the site. now a consultant he calls the second roll out a period of adjustment. >> health insurance companies came to the market last year and made guesses about prices. some priced too high, some prices too low. >> reporter: the average premium is going up in 24 states, but in at least 11, premiums are going down. if you're satisfied with your current plan, you don't have to re-enroll, but mendelson says shop anyway. >> it's quite likely that a person will be able to find a less expensive plan that is