Have seen this with multiple repairs where the digitizer was replaced. In each case it was a problem with the digitizer cables where it gets tucked under the glass near the edge of the frame. Not yet sure if they are badly made digitizers or if the cable gets damaged trying to tuck it under frame during installation.
Once they have, you'll be able to view a graph of their reputation gained over time.
Here's a preview of what the graph will look like:
No reputation gained yet.