One of the big things that I struggled with as I started using the Mac was what web browser should I use. Safari is the default and it isn't a bad browser, but I have been a huge fan of Firefox since with was called Firebird. This left me in something of a dilemma.
The thing about Macs that I'm discovering is that a Mac is not just a piece of hardware and associated software. A Mac is a package deal. An experience. All the applications just fit together with Jobsian perfection and predictably. Picking a non-standard application to do something basic like surfing the web makes you fear that you might through the planets out of alignment.
I was being open-minded about trying new things so I gave Safari a chance. Safari is a sound browser. It is fast has a basic interface that works well. By far the coolest feature of Safari is the three-finger swipe to go back in the browsing history is incredibly useful and intuitive. Other than that, Safari is a decent browser but unremarkable otherwise.
One issue that I would like to point is that the built in RSS reader is a little odd.

It works fine, but it's a stand alone application. My use of RSS has evolved into a means of sharing information with other people rather than just keeping it to myself. Safari did not provide any means of sharing the RSS posts that I have grown accustomed to while using Google Reader.
The other thing that I didn't like about Safari was its lack of extensibility. Having used Firefox for the last several years, I have grown to expect my browser to plug into the latest information sharing widgets. Safari just doesn't do this. I looked all over for some type of hook into
del.icio.us and
StumbleUpon and couldn't find anything. I thought that I could work around that but as I surfed without the ability to share the cool stuff, I found that I really missed that part of web browsing. In short, that ability to share what I found with others was more important that the three finger swipe to move forward and backward in my web browser.
Suffice it to say, I'm back with Firefox and I am happy with the decision. I actually think that it enhances my experience with the Mac. I would recommend anyone switching to a Mac to try Safari, but seriously consider using Firefox as their primary browser.