For the last several years, GPS units have come in two sizes: 3.5-inch and 4.3-inch. Fast forward to 2009 and larger sizes are now not only common, but affordable too.
Oldies and the hard of sight amongst us appreciate the benefits of larger screen sizes — text and maps are much easier to see — although this is achieved by robbing us of a bit more windscreen real estate.
The entire Navman MY line, entry-level MY30 excluded, sport 4.7-inch screens and have largely banished last year's interface issues, where button presses were confused with scroll swipes and vice versa. Relative newcomer Uniden, meanwhile, makes a compelling case with its very reasonably priced 5-inch Trax 5000 model, which has had its own interface makeover.
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