my rino 520 be almost the most awesome electronic gadget I have ever purchase . the 2-way radio work great - better speaker sound and range than any other radio I have own . almost great gp with the color screen and optional topo mapping . user friendly interface . above all the location feature of a fellow user be the killer asset . if the unit work perfectly I would highly recommend anyone to buy it . but I must add my agreement to previously mention issue : my screen go blank occasionaly . come back on after a power off-on cycle then sometimes will stay on long term , sometimes require another off-on cycle . the optional topo map usually show some incredible detail about very obscure road , but yet have not be update to a major highway reroute in my state which be complete 30 year ago . overall I would definitely buy another of these after know the bug have be work out . for now I be glad I own it even with the bug . look forward to when Garmin correct the quality issue .