The Commonwealth Fund survey was released Monday as the government announced the website will be down for maintenance every night, NBC News reported.
Social Science Research Solutions conducted the poll for the fund and explored respondents' reasons for not purchasing policies. Almost half, 48 percent, said they were unsure they could afford available policies, 46 percent said they were trying to make up their minds between plans and 37 percent reported technical problems with the site getting in their way.
Only 21 percent of those who had gone on the site reported purchasing policies. Susan Collins, who was in charge of the polling, said there appeared to be few happy customers.
"Seventy percent of people who visited the marketplaces rated the experience as fair or poor," Collins said in a telephone interview. "It is disappointing that people did have problems enrolling in health plans."
The survey was conducted Oct. 9-27. The polling company interviewed 4,000 people, including 682 who were uninsured.
The margin of error is 4 percentage points.
Mena Suvari shares her delightfully awkward Christmas card photo
Obama 'selfie' photographer speaks out: 'Photos can lie'