Well, I'd much rather press fewer keys than deal with the Trekker. Some day (when I win the lottery) I'll get a PK, but I love having that Braille display. After using ow Trekker in heavy traffic, and using the Sendero, I found it frustrating with the Trekker because I couldn't always hear what it said. And there was no braille display to refer to. Debby and Cleo