Problems: 1) GPS was not identifying my location very well. gave a rather large cone of uncertainty and turn-by-turn directions was not usable. 2) wifi connectivity was suspect. my device had to be very close to a router to connect. 3) bluetooth connectivity was also bad. my device had to be very close to connect to the peripheral.
It went well. Instructions were very detailed and simple enough to get through. After replacing the part, the phone was fully functional again and all my issues were fixed.
Step 23 - that little connector was pretty tough to disconnect. stay sane. it'll come up eventually.
Step 36 - the standoff screw was a bit problematic. the 'essential electronics toolkit' has a really small flathead and then one that's a big larger than that. the ideal size would be something in between the two. i ended up making it work, but wasn't the easiest to remove.
Everything else was smooth.