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Garmin GTM 21

Garmin GTM 21
alaScore 75

45 reviews

Oct, 2015

alaTest has collected and analyzed 45 reviews of Garmin GTM 21. The average rating for this product is 3.4/5, compared to an average rating of 4.0/5 for other GPS for all reviews. Reviewers are impressed by the size and price. The design and performance are also mentioned favorably, whereas views are divided on the reliability.

usability, performance, design, price, size

We analyzed user and expert ratings, product age and more factors. Compared to other GPS the Garmin GTM 21 is awarded an overall alaScore™ of 75/100 = Good quality.

Review analysis

(Based on 45 reviews)

User Reviews  

Showing 34 review(s)

Expert Reviews User Reviews
Showing 1 - 34 of 34 Show Reviews: in English | in other languages (11)

Consumer review by: ( review summary for Garmin GTM 21


alaTest has collected and analyzed 34 user reviews of Garmin GTM 21 from The average user rating for this product is 3.1/5, compared to an average user rating of 3.9/5 for other GPS on Reviewers really like the size and performance. The price and design are also appreciated, whereas there are some mixed reviews about the reliability.

usability, design, price, performance, size

65% of the reviews on give this product a positive rating.

This summary is based on the product: Garmin GTM 21 (UK) FM TMC Traffic Receiver

Oct, 2015