On a GO you can get traffic too with the external wired RDS/TMC receiver or the intregated one with stand. Works with RDS/TMC data from FM broadcast stations. A GO has a small screen, I like de 6 inch models btw the GO600/610 series with lifetime maps. GO 530 processor and memory are very old and slow in use by recalculation or long trips.
On a top Android phones it works very smooth and easy. Use a 9V advanced carcharger otherwise your battery will be soon ended empty. Older fones use 12 to 5V adapters on USB.