For me the app works because I only use it as one part of my screening process, I have seen several clients with reports and will continue to do so.
My one and only frustration with the app is the length of a report.
We have 280 characters (i think) to make a report that is helpful to others, so when I see reports that are one or two words long they add nothing to help me decide.
I've seen,
Idiot (how is he an idiot, tell me, cos im an idiot at times) Timewaster, OK but how did he waste your time
Stupid man or similar, again explain ffs
No show, OK I get that but give me an idea what he was like in coms, did you speak or was it text etc
If I could make one improvement it would be that reports need to be a minimum length to encourage a user to write something meaningful