It is an ok move. Smart to get something done early before FA $$$ gets out of hand. Pros, RHB with power, probably hits 5 or 6, solid D and some speed on the basepaths. Cons, between Uggla and Upton there will be lots of millions of dollars striking out.
I think you will see Bourn get more money than Upton got.
Braves now need to trade Tommy Hanson for a leadoff hitter. Denard Span fits well, put him in left and Prado at 3b. Also a guy like Chris Nelson for 3B and hitting leadoff may make sense. Maybe a package of Hanson and Teheran to the Royals could get Gordon for LF. Who knows, but Braves need.to deal Hanson to fill a need.