'even big screens can be difficult to read in direct sunlight.'
'the Bluetooth hands-free option is ideal.'
'Expensive map updates.'
'this portable navigator is priced right and ultra-easy to use.'
'variable-use global positioning device'
'such a huge screen'
'inconvenient memory card slot'
'This is key - wait for the lips to appear green before you speak. .'
'nothing is labeled.'
'equally impressive performance'