Pros
The experience and training you get in Special Forces cannot be beaten. You will interact with senior U.S. and foreign government officials. You will be comfortable with a level of ambiguity that is unbelievable to people who have not experienced it (e.g. mission: go to country X and perform special operations). Within the military, Special Forces and Special Operations are like the Ivy League. If you choose to leave the military (honorably, of course), people may not understand what you used to do, but they respect it all the same.
Cons
Technology. Special Forces soldiers today are selected based mostly on the same criteria as 50 years ago. That is: they are highly independent, highly intelligent, and healthily aggressive. The pitch to get them to join is that they will be able to work far from any headquarters without a safety net, and that your commanders will be interested in cold hard facts and your assessment of those facts. In fact the job is often political. You are always plugged into a radio or a computer system, and much of your time is spent writing reports which paint a rosy picture of a bad situation. Failure to show "progress" is often viewed negatively, even when the people reading the reports know full well that the progress is largely imaginary.