According to a recent report,

61% of adults who are paying for health insurance through the Affordable Care Act's health insurance marketplace consider it "very" or "somewhat" easy to afford the premiums.

Source: "New Commonwealth Fund Report: Most People with ACA Marketplace Health Insurance Say They Can Afford Premiums; Lower-Income Adults Report Costs Similar to Employer Coverage," The Commonwealth Fund Press Release, September 18, 2014, http://www.commonwealthfund.org/publications/press-releases/2014/sep/most-people-with-aca-plans-can-afford-premiums