Five stars on their own say very little. What counts is what sits behind them.
Volume before average
A professional on four point six across two hundred jobs is more predictable than a five across three. The average only means something once there is a history.
Read the four-star ones
They are the most honest. Five stars is usually enthusiasm and one star is usually a bad day. The ones in the middle explain what went less well and whether it was put right.
Look for patterns, not episodes
An isolated delay happens to everyone. Three comments about delays in the same month is a pattern.
Value concrete detail
Comments that mention times, names and what was done are worth more than generic praise. They describe the job, not the mood of whoever wrote it.
Look at the reply to a complaint
How a professional answers a bad review says more about them than ten good ones.
In the OSCAR app reviews come from people who actually booked the job, and the profile shows the full history.