Strengths
-More people= more ideas
-The work can be divided among people on the team, opposed to doing it all myself
-The team's "job" or assignment can get finished faster
Weaknesses
-Most teams are a democracy, so your idea(s) could be rejected
-You have to be able to trust others to do their fair share of work and correctly
-While the goal may be accomplished faster, it may not look or be the way you may have wanted it to.