Timing — sent while the job is still fresh, before the customer forgets what a good job you did.
Personal — uses their name and the specific job, not a generic template that feels like marketing.
Low friction — one tap on the link. Most reviews come from people who were going to leave one anyway but needed the nudge.
★★★★★
“Phil fitted our new bathroom and the result is absolutely stunning. Would not hesitate to recommend.”
— Derek Watts, Wellingborough