Methodology

The overall score

Overall = weighted average of four components on a 1–5 scale: owner sentiment (40%), recommendations (15%), spec score (25%) and value (20%). A component without evidence is Not rated, and its weight is spread across the others; it is never counted as zero.

• Owner sentiment: Bayesian average of owner comment ratings, (C·m + Σwᵢrᵢ)/(C + Σwᵢ), with prior weight C = 5 and category mean m = 3.87. Comment weights grow with upvotes, double for the last 12 months and ×1.5 for comments over 100 words. Low-volume models are pulled toward the mean, so one glowing comment cannot reach 5.0.
• Recommendations: 1 + 4·log(1+n)/log(1+max), where n counts owner comments that explicitly recommend the model.
• Spec score: average rank of the model's published torque, speed, hammer rate, weight and length within the tracked set. Only published fields count.
• Value: needs observed prices. No Amazon prices have been recorded yet, so value is Not rated for every model.

Where the reviews come from

Reviews are Reddit comments only, from r/Tools, r/DIY, r/HomeImprovement, r/Construction, r/woodworking, r/electricians and brand subreddits, via the Arctic Shift Reddit archive. A comment counts toward a model when it names the model (model number or known nickname). A top-level reply in a single-product thread counts when it refers to the drill ("it", "the drill", "mine") and names no other brand or model. Comments naming only a brand feed brand pages, not model scores.

A comment is an owner comment only when the writer describes their own use. Questions, hypotheticals, bot replies and deleted comments are excluded. Ratings come from sentiment words in the comment. One comment per author per thread counts.

Evidence thresholds

• A model is published only with a manufacturer spec record and at least one owner comment (34 of 144 tracked models qualify).
• Models with fewer than 5 owner comments, brands with fewer than 3 and use-case pages with fewer than 3 qualifying models are shown but kept out of search engines (noindex).
• Comparisons exist only when both models have 5+ owner comments and share drill type and voltage.

Known limits

• Sentiment and theme detection are keyword rules, not human reading. Every quote links to the original so you can check it.
• Specs come from manufacturer pages. Unpublished values stay blank and are never estimated. Some international models (e.g. Makita DHP/DDF) are tracked separately from their US equivalents.
• Reddit skews toward enthusiasts and pros.

Updates and independence

Data is refreshed monthly. Current data: 2026-10-17. Commissions never affect scores, rankings, or verdicts. Every score is computed from Reddit owner comments and manufacturer specs by the same formula.