was ronald reagan a good president or bad president?

Yes.

When Reagan took office the economy was one of the double-digit inflation and high interest rates. During his first year in office, Reagan engineered the passage of $39 billion in budget cuts into law, as well as a massive 25 percent tax cut spread over three years for individual, and faster write-offs for capital investment for business.

Although inflation dropped from 13.5% in 1980 to 5.1% in 1982, a severe recession set in, with unemployment exceeding 10% in October, 1982 for the first time in forty years. The administration modified its economic policy after two years by proposing selected tax increases and budget cuts to control rising deficits and higher interest rates. After the 1982 downturn, the reduced inflation rate (under 5% for the remainder of the administration) sparked record economic growth, and produced one of the lowest unemployment rates in modern U.S. history (unemployment hit a 14 year low in June of 1988). As Reagan left office, the nation was experiencing its sixth consecutive year of economic prosperity.

Reagan led the battle for a Social Security reform bill designed to ensure the long-term solvency of the system...

Reagan encouraged the development of "private sector initiatives" as well as federalism, with the objective of transferring from the federal government some of the responsibilities believed to be better served by private business or state and local government.

At the heart of Reagan's foreign policy was the prevention of communist expansion.

When Ronald Reagan became president, he had a clear vision of what the nation should be and spelled out the direction he hoped it would take during his administration. Reagan had a clear social, economic, and foreign policy agenda, and with political guile and personal persuasiveness he was able to achieve many of his goals.

Source: http://www.reagan.utexas.edu/archives/reference/pressketch.html