Obamacare has offered insurance to millions of people, but a survey revealed that two-thirds of them are unhappy with the coverage they're getting and are particularly upset about the costs.

Deloitte asked more than 3,800 adults, including 406 exchange enrollees, to rate their satisfaction from one to 10.   

Only 30 percent of customers were satisfied with their coverage, the consulting firm said, according to Joe Miller.

The firm also revealed that only 25 percent of customers in the survey were confident that they could get care when they needed it, while only 16 percent felt "financially prepared" to handle future health care costs.

"Those are not high numbers," said Paul Lambdin, a director for Deloitte's work on insurance exchanges and retail practices. "I think you'd have to go a lot deeper to really discern that at this point. They're muddied together."

The poll's findings contradicts findings in other surveys that indicated that enrollees were satisfied by their coverage. In particular, a Kaiser Family Foundation poll reported that 75 percent of people rated their coverage as either "good" or "excellent", according to The Washington Times.

These discrepancies could be possibly attributed to how the surveys measured satisfaction and how much weight was given to people who feel lukewarm about their plans.

For example, more than half of exchange customers said they were in the "somewhat satisfied" range of four to seven. A "somewhat satisfied" response in this poll might translate to a "satisfied" response in another.

Fourteen percent of exchange users said they were "not satisfied." In contrast, those who have coverage through Medicare, Medicaid or plans through their employers had dissatisfaction rates in the single digits. 

For now, analysts say that it is hard to tell whether dissatisfaction is the byproduct of a new customer base or whether the law itself has structural problems.