My nexus 5 still had the original factory battery. It would drain quickly even after very limited use,.
The repair itself was fine.. Prying the battery without bending it was a little difficult. Unfortunately I didn't have any service after I put it all together. Had to take apart and reassemble many times, while making sure the antennas were still attached. And finally the battery did not seem to add any battery life at all. Still drains quickly.
Add a note about the antennas and verifying they are connected appropriately, before closing. Also a troubleshooting note about that potentially happening would be helpful.