I have a picanto 1.1 LX Auto, and my opinion is: It changes gear perfectly, is safer to drive, less wear on the clutch parts so it could prove cheaper! There are many good things to say about Auto...But I cannot think of any to say about mannual, except if your battery is flat with manual, you could bump-start it!
If you like pushing your foot down on the clutch and changing gear...Thats fine...Good-on-yer...But lets be fair...Auto-Driving is much safer than manual.
My vote is for Auto every time.
My kindest regards, John.