I have a 700 ..a friend has a 720..his is readable in direct sunlight..mine is too but not as "bright"? clear..he can update his thru wifi..I have to load my SD card..they both draw low amps/volts..both are ADS-B adaptable..I have roads loaded as well..he does not..very versatile GPS..tons of info ..plates approaches etc and selectable as to which you upload..sectionals too..you don't have to load every chart..just the ones you use