Brian Gavin Diamonds vs myGemma: most-reported complaints compared
Most-reported issues at Brian Gavin Diamonds and myGemma, according to reviewers on Trustpilot — classified by our automated reader and backed by verbatim quotes from distinct reviews. This is a side-by-side of what reviewers report, not a score, rating or recommendation for either company.
Brian Gavin Diamonds
TrustScore 4.8 · 1,894 reviews on Trustpilot.
250 reviews analysed, 2014-10-19 to 2026-08-22.
Complaint rate (recent window): 2%
33% of negative reviews get a company reply.
“I waited 6 weeks and they made them wrong.”
myGemma
TrustScore 4.8 · 3,431 reviews on Trustpilot.
295 reviews analysed, 2022-09-19 to 2026-09-23.
Complaint rate (recent window): 4%
92% of negative reviews get a company reply.
“they turned around and tried to blame me so they don't have to take responsibility.”
Reported on both
Issues with an evidenced category (at least two verbatim quotes) on both sides.
| Issue | Brian Gavin Diamonds | myGemma |
|---|---|---|
| Support unhelpful | 31% | 19% |
| Faulty product | 20% | 15% |
| Not as described | 13% | 23% |
| Delivery failed | 9% | 14% |
| Other | 7% | 17% |
Method: reviews are classified into a fixed complaint taxonomy by an automated reader; every category shown is backed by at least two verbatim quotes from distinct reviews. Figures are census classifications, not official statistics, and reflect what reviewers reported — not findings of wrongdoing by either company. Not affiliated with, endorsed by, or sponsored by Trustpilot A/S, Brian Gavin Diamonds or myGemma.