I had to charge the battery at least two times a day, when I used the phone a lot, up to four times a day.
The repair went very well, and the instructions on iFixit were easy to follow. I recommend everyone who have the same battery problems to do the same, and change their battery.
The battery change went very well, but I experienced som problem with the tiny antenna-part that came loose when the old battery was removed. This should be better descibed in the web instructions (with photoes).