iPhone 5 lower volume replacement, iPhone 4 home button replacement
I had two problems, a long time sticky home button on my iPhone 4, and a inop lower volume button on my iPhone 5.
The repairs went well. I took my time, followed the guides, and it all turned out well. They work like they're supposed to.
Patience, a lot of it. Label everything, document which screws are non magnetic for proper re assembly. Don't rush. Take breaks, and just breathe.