I was having problems with the lightning connector. To connect I had to pull the cord upwards and around the phone, carefully put my phone down and pray that the connections wasn't lost while charging/transfering data.
I ordered the tollkit and the magnetic mat, The tools I needed of course, but I am REALLY happy I ordered the magnetic mat as well. The tiny screws are easilly organized, and I would have been lost without it.
The screws are tiny and I had a constant fear that I had broken something while unplugging different connectors inside the phone. After going through the process and doing it in reverse also (this is where the magnetic mat really comes into play) to put the phone back together, it all worked perfectly without a hitch. It took some time, perhaps a couple of hours. If you plan on doing it more then once I would think this operation can be done easilly within 30 minutes to an hour, once you are familiar with the steps. I was also not sitting comfortably (too low table... I regretted that when I finally sat up from the miniature world I was in) I was also afraid to brake the parts, and this can only be learnt by experience so it can easilly be done much faster then I was working.
I was also constantly checking the video and the online step by step guide (both were essential, but if I where to choose I would use the step by step guide, but crosschecking it to see how the person in the video did the steps was also helpfull).
All in all I was very happy with the repair. For sure I will try all repairs myself from now on.
Magnetic mat - essential for me at least to organize screws by steps and size
Good light in work area
Use a table and chair that is comfortable - especially if you are inexperienced, it will take some time for you to complete all the steps, and you don't want to spend 2-3 hours hunched over the TV table :)