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Garmin GTM 21

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. Opinions about the size and price are overall positive. The design and performance are also mentioned favorably. There are some mixed views about 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 73/100 = Good quality.

Review analysis

(Based on 45 reviews)

User Reviews  

Showing 34 review(s)

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

Consumer review ( 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 also get good feedback, whereas there are some mixed comments 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 products: Garmin GTM 21 (UK) FM TMC Traffic ReceiverGarmin GTM 21 (UK) FM TMC Traffic Receiver

May, 2018