As compare to other IV undergraduate schools, what is so great about
Harvard College?

Dear Dzope, 

First of all, I assume that by "IV" you meant "Ivy". Harvard
University (with seven other universities) is part of the "Ivy
League", a sports league.

You can read about the Ivy League here: 

Wikipedia - Ivy League
<http://en.wikipedia.org/wiki/Ivy_League>

Harvard University is considered better in many subjects and faculties
than other universities, including those in the Ivy League. That means
that one has leading teachers and peers and more importantly,
connections and perstige when they graduate.

However, this doesn't mean that studying in other Ivy League
institutions is "bad". All of these institutions are elitist and
selective, have very good teachers and strong departments. The
difference is perhaps in the level of prestige, as well as in figures
like these:
"Harvard has the world's largest university library collection (third
largest library overall after the British Library and the Library of
Congress), and the largest financial endowment of any academic
institution, standing at $25.9 billion as of 2005." (SOURCE:
Wikipedia, Harvard, <http://en.wikipedia.org/wiki/Harvard_University>).

Harvard also produced more US Presidents than any other university
(See: "List of U.S. Presidents by college education",
<http://en.wikipedia.org/wiki/List_of_U.S._Presidents_by_college_education>).
But that doesn't mean that other colleges/universities are of lesser
quality: George W. Bush went to Yale for his first degree, for example
(and to Harvrd Business School for his MBA).

You can see college ranking at the US News and World Report: 
Naitonal Universities - Top Schools
<http://www.usnews.com/usnews/edu/college/rankings/brief/natudoc/tier1/t1natudoc_brief.php>

I hope this answers your question. Please contact me if you need any
clarification on this answer before you rate it.

Harvard is probably the best for some people and some majors, but
there are lots of good schools.

You can also judge a school by the number of Nobel Laureates there and
who actually does the teaching - grad students or the professors.
There are a lot of Nobel Prize winners at Harvard and the heads of
departments used to actually teach classes (can't speak to the current
situation but it is a long tradition.)

You can get a taste for the quality by checking out
http://www.extension.harvard.edu/
more easily than trying to judge the day school even though it is the
same classes by some of the same teachers, using the same text books.

Pay special attention to the online courses which anyone can sign up
for and complete for credit even without going through the tight
admission requirements for day school.

Of course Harvard has been around for a while too which counts for something.

Then there is the cheap steak and eggs at Leyman Hall and the full
scholarships offered for low income families.