he's clearly got the talent and brain to link up w/ MaraVilla and Iniesta going forward (Alba, Villa, and Iniesta could single-handedly destroy a fort, never mind a parked bus). The fact that 80% of Barça's attacking impetuous comes from the right side has been a big point of contention for me. Alba will offer some balance for the team going forward. However, his defense will come under a lot pressure considering that FCB play with 1 pivot, 1 converted CB, and a certain awesome Brasillian on the other side of the pitch who resembles a weapon of mass destruction more than a defender. how he learns to pick and choose his spots will determine if this is a 3/5 signing or a 5/5 signing. Not to mention that awesome job that Eric Abidal does defending wingers (especially the so-called 2nd best player in the world) that Alba now has to replace.
I'll go with a 4 for now.