Just finished this project and it took me about 1.5 to 2 hours from start to finish. Here are a few things to lookout for.
1. the antenna connecting node on your new lighting blot assembly is pretty low quality as mine popped off at some point and was gone forever. I now only have half the phones antenna in use... this makes me sad.
2. You will need to use the old, original rubber housing for your microphone as the new new lighting blot assembly does not came with it.
3. You will need to use the original "home button to lighting blot assembly" housing as the new new lighting blot assembly does not came with it.
That being said, this was the absolutely first time I have ever opened any electronic device ever and I still have a somewhat working iphone aside form the antenna issue. If I can do this, anyone who knows how to take their time and read can do this no problem.