You are asking a favor, so it has to read like a person asking. Every line below is written that way, and the scorer marks any promotional styling here as a red check, not a style note.
49.1% average open across 444,915 OnVoard review-request sends.
This is the aggregate for the Reviews email type as a whole (request, reminder, and reply emails together), not the request stage in isolation, and it is an average across every OnVoard merchant sending review requests, not a promise for your store.
You are asking a favour, so it has to read like a person asking. Promotional styling here (caps, emoji, exclamation marks) makes a sincere question look like an ad. Every line below is scored against this exact profile in the subject line tester.
Grouped by purpose. Every line scores 85 or higher against the review request profile, with no red checks. Click "Test this" to see why, or to try your own version of it.
These are the subject lines. OnVoard runs the Review Request flow itself, timed after delivery so the ask lands when the product has actually been used.