What percentage of reviews are fake for this product?

28.00% of the analyzed reviews appear to be fake or inauthentic.

What is the authenticity grade for this product?

The product receives a grade of C based on review authenticity analysis.

How many reviews were analyzed?

15 reviews were analyzed for authenticity patterns.

What is the adjusted rating after removing fake reviews?

After removing suspicious reviews, the adjusted rating is 4.20 out of 5 stars.

How does this analysis help consumers?

This analysis helps consumers identify products with manipulated reviews, enabling more informed purchasing decisions based on genuine customer feedback.

Is this product priced fairly on Amazon?

Based on AI price analysis, this product is Unable to compare.

How is this product positioned in the market?

This product is positioned as a Mid-range option in its category.

Yamaha 88-Key Weighted Portable Digital Piano Keyboard with Music Rest, Sustain Foot Switch, Built-in Speakers, USB Connectivity, Black (P45B)

Name: Yamaha 88-Key Weighted Portable Digital Piano Keyboard with Music Rest, Sustain Foot Switch, Built-in Speakers, USB Connectivity, Black (P45B)
Brand: Amazon
SKU: B00UJ9LNDK
Availability: InStock
Rating: 4.2 (15 reviews)

ASIN: B00UJ9LNDK

Analysis Date: Nov 20, 2025 (re-analyzed Nov 20, 2025)

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Review Analysis Results

Authenticity Grade

28.00%

Fake Reviews

4.93

Original Rating

4.20

Adjusted Rating

Analysis Summary

The review set shows moderate authenticity concerns with several suspicious patterns. While most reviews appear genuine with detailed, personal experiences, there are notable red flags: 1) Extremely high 5-star concentration (14/15 reviews are 5-star, 93%), which is unusually positive even for a quality product; 2) Several reviews use nearly identical phrasing about 'rich and realistic sound' and 'perfect for beginners and experienced players' suggesting potential copying; 3) One review appears duplicated (R36EII0JV81U93 appears twice with identical content); 4) Some reviews are overly generic or contain non-English text without clear context. However, many reviews contain specific, believable details about personal situations, product features, and realistic usage scenarios that suggest legitimate customer experiences.

Review Statistics

1,948

Total Reviews on Amazon

-0.73

Rating Difference

Price Analysis

The Yamaha P45B is a well-regarded mid-range digital piano that typically retails around $550. Since the current Amazon price is unknown, monitor for drops below $450 for a good deal. This keyboard represents solid value for its quality and features compared to both budget and premium alternatives.

MSRP Assessment

Estimated MSRP: $549.99

Source: Brand typical pricing

Amazon Price: Unable to compare

Market Position

Positioning: Mid-range

Alternatives Range: $200-$1,200

Value: The Yamaha P45B offers professional-grade weighted keys and Yamaha's sound quality at an accessible price point, making it excellent value for beginners and intermediate players.

Buying Tips

Best Time to Buy: Best prices often appear during holiday sales (Black Friday, Cyber Monday), back-to-school season (August), and Amazon Prime Day.

Deal Indicators: Look for prices below $450, bundle deals with stands/benches/headphones, or coupon discounts on the product page.

Watch For: Be wary of third-party sellers pricing significantly above $550, sellers with low feedback scores, or listings that don't specify if accessories are included.

Price analysis generated by AI based on product category and market research. Actual prices may vary. Last analyzed: Dec 1, 2025

Understanding This Analysis

What does Grade C mean?

This product has moderate review authenticity concerns. A notable portion of reviews show suspicious patterns. Consider reading reviews carefully before purchasing.

Adjusted Rating Explained

The adjusted rating (4.20 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 (4.93 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.