100 "Derby Premium" Single Edge Razor Blades for straight razor
As an Amazon Associate I earn from qualifying purchases.
Review Analysis Results
Analysis Summary
The overwhelming majority of these reviews appear genuine, with approximately 85% showing authentic characteristics. All reviews are verified purchases, which significantly increases their credibility. The reviews display a natural distribution of ratings (mostly 5-star but with some 4-star and 2-star reviews), varied writing styles, and specific personal experiences that align with genuine user feedback for a quality product. The high percentage of positive reviews is consistent with what would be expected for a well-received, inexpensive consumable product like razor blades.
Strong evidence of authenticity includes multiple reviews with specific personal context and detailed usage experiences. Review #3 provides detailed first-time user experience with specific mention of shavette compatibility and usage patterns. Review #5 offers balanced feedback with specific durability metrics (2 full clean shaves per blade) and comparison to Parker's blades. Review #7 includes professional barber context with specific performance details (2-3 back of neck shaves per blade) and price point mention. These detailed, specific reviews with varied perspectives strongly indicate genuine user experiences.
A few reviews raise minor concerns due to their extremely brief, generic nature that could potentially be part of review manipulation, though they could equally represent genuine users who simply don't write detailed reviews. Review #2 ("Loved these blades"), #4 ("Good razors"), #10 ("Good product"), and #13 ("As described") are extremely brief without any specific details, which is the primary pattern that could indicate potential manipulation. However, these represent only 4 of 15 reviews, and such brief reviews are common even among genuine purchasers of inexpensive products.
Overall, this review set appears predominantly authentic with a small subset of potentially suspicious reviews. The detailed, specific reviews with personal context strongly outweigh the few generic ones. The product appears to be a well-received, affordable razor blade option that performs adequately for most users, with some variability in sharpness consistency as noted in genuine reviews. The presence of a 2-star review in Arabic further supports authenticity by showing genuine negative feedback from an international customer.
Key patterns identified in the review analysis include: Verified purchase status for all reviews, Varied review lengths from extremely brief to detailed, Natural rating distribution with mostly positive but some critical feedback.
Review Statistics
About Review Data Collection
We extract as much review data as Amazon makes available at the time of analysis. The amount may vary due to Amazon's rate limiting, regional restrictions, or other factors. Our analysis is based on the reviews we successfully collected.
Want to analyze more reviews? Install the Null Fake Chrome extension to capture and analyze additional reviews as you browse Amazon.
Free, quick to install, and works on Chrome, Edge, Brave, and other Chromium browsers.
Price Analysis
Derby Premium blades are positioned as a budget-friendly option in the safety razor market with exceptional customer ratings. Given the 4.71/5 rating from over 13,500 reviews, these represent strong value in their category. Look for prices around $20 or less for 100 blades and prioritize Amazon-fulfilled purchases to ensure authenticity.
MSRP Assessment
Market Position
Buying Tips
Understanding This Analysis
What does Grade B mean?
This product has good review authenticity with minor concerns. While most reviews appear genuine, we detected some patterns that warrant mild caution.
Adjusted Rating Explained
The adjusted rating (4.40 stars) represents what we estimate this product's rating would be if fake reviews were removed. This product's adjusted rating is lower than Amazon's displayed rating (4.71 stars), suggesting positive fake reviews may be inflating the score.
How We Detect Fake Reviews
Our AI analyzes multiple factors: language patterns (generic vs. specific), reviewer behavior (history, timing), temporal anomalies (review clusters), verification status, sentiment authenticity, and statistical outliers. No single factor determines a review is fake - we look at the combination of signals.
Important Limitations
No automated system is perfect. Sophisticated fake reviews can evade detection, and some genuine reviews may be incorrectly flagged. Use this analysis as one data point in your purchasing decision, not the only factor. Reading actual review content yourself is always valuable.
