A defiant President Obama said Monday he is "mad" about problems with a new health care website, but argued that the Affordable Care Act as a whole is working as planned.

While Healthcare.gov hasn't worked "as it was supposed to have worked," Obama said during a White House speech that once-uninsured Americans have signed up for coverage and are receiving benefits.

"The product -- the health care -- is good," Obama said.

Facing attacks from Republicans and other critics of Obamacare, the president said his health care team is reaching out to tech experts to help fix massive website problems that have hampered the rollout of his landmark piece of legislation.