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Garmin GTM 21

Garmin GTM 21
alaScore 75

62 reviews

Jan, 2015

  • No negative mentions yet

alaTest has collected and analyzed 62 reviews of Garmin GTM 21. The average rating for this product is 3.2/5, compared to an average rating of 3.9/5 for other GPS for all reviews. Reviewers are impressed by the usability. The performance is also appreciated.

price, performance, usability

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 62 reviews)

User Reviews  

Showing 34 review(s)

Expert Reviews User Reviews
Showing 1 - 34 of 34 Show Reviews: in English | in other languages (28)

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 usability. The performance also gets good views.

price, performance, usability

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