My iPhone 5 battery was losing its charge quickly and erratically.
Mostly, the repair went well as I followed the instructions in the video and in the associated written directions and photos. The tools in the kit worked well and were essential.
My main recommendations are as follows:
-- Be gentle and be patient.
-- Use the magnetic mat to avoid losing the small parts.
-- Use the tweezers with magnifier to handle the screws.
-- Read other people's accounts and recommendations
-- Do not expect a perfect fit of the panel once you're done. You are opening a device that is not really meant to be opened by the consumer. If the fit is not perfect but the phone works fine and the new battery works as it should, the minor imperfections should be tolerable. At least, that's how I feel with a DIY job. Eventually I'll get a new iPhone and the fit will be perfect -- until it's time for another replacement.