Time to change - Service Battery
15 - 30 minutos
My MBP battery died more than a year. It could only last for around 2 hours or less.
Everything go smoothly as the guide described. I brought a set of screwdriver bit from local store and surprisingly, it does include star shaped screwdriver for macbook pro battery!. It costs less than $100 HKD which is around USD 12.
During the removal of old battery, I found that all three mount point of it is broken, might be caused by few times of falling down.
The initial Full Charge Capacity seems varies and keep decreasing to 67xxmah. But it raise up to 71xxmah after few days of use. So don't panic.