My daughter said her cat pushed her phone in the toilet and she couldn't talk out on it any longer. Hmmm a likely story! I disinfected it prior to repair.
Yes repair went well with the tools and microphone kit I purchased from ifixit. It took about 45 minutes using the online repair guide with the great pictures.
Don't let the cat in the bathroom with you! Really the only advice would be to keep track of the screw sizes. I drew circles on a paper towel and set the screws in the circle for different steps since there were different lengths
P2 Pentalobe Screwdriver iPhone
iFixit Opening Tool
iPhone 4 (CDMA/Verizon) Dock Connector