I be look for a `` Top of the line '' consumer product - and have have good luck with Garmin aviation product in the past - so I think the GPSMAP 60csx be a good choice . though the unit do have some nice feature - but it have some glaring deficiency that must be acknowledge for the sake of would-be buyer . no map be include with the unit . ok - there be a `` base map '' that come with it - but it only include major highway . even in a `` big city '' there be not enough street show to figure out where you be with any degree of precision . in rural area or small town - you will appear to be out in a field when you be actually walk down Main street . the `` Base Map '' include be nothing but a tease - completely worthless . the `` OPTIONAL '' MAPS be expensive - figure on spending at least $ 60 for a detailed map that include the lower 49 -lrb- lower 49 ?! wonder if that include Hawaii or ??? -rrb- this be just plain `` cheap '' on Garmin 's part . the po nextar gp I buy for $ 59 2 year ago have detail map include . ca not Garmin do you the same courtesy when you spend $ 2oo + for they `` premium '' gp ? the include MICRO sd chip be TOO SMALL to DOWNLOAD A map to . geesh guy - thanks for the `` free '' 1gb Micro sd chip . too bad the smallest map take 1.2 gig ! I have to go out and buy one for $ 15 . be not you customer 's convenience worth that much ? you CA not DOWNLOAD MAPS DIRECTLY to the gpsmap 60csx ! that be right - this top of the line product can not just be hook to you pc with the usb cable to download the upgrade . you have to download the map to the Micro sd with a adapter . another trap - the software use for download do not `` know '' that the GPSMAP 60csx can not directly accept a download - it imply that it can , then will stubbornly try to do it - make you waste time until it time out with no helpful error message . Garmin 's licensing and copy-protection scheme make you jump through quite a few hoop . in spite of the fact you can not download map directly to this unit - you \* must \* have the unit attach to the pc while you be download as well as have the micro sd attach . apparently Garmin 's software do not like Mozilla Firefox either . try to use that browser will not show you the option link you need to select the Micro sd as a download destination . download the 1gb + file - even at dsl speed - did take quite a long time . apparently Garmin 's `` time remain '' feature on the connection software be schizophrenic - as it bounce between 21 minute and 45 minute and a few other random number before it finally finish - some large number of hour later - I get tired and go to bed 3 hour after it start download . `` maddening '' and `` patience-trying '' be two good term for what you will endure install map on this device . if I have a Garmin software `` engineer '' with I when I be do , I likely would have throttle he before the night be over . it be \* that \* bad . bitch aside - time will tell how useful this unit be , but if actually use it be near as painful as just install a map - I do not have high expectation so - go ahead and buy this unit in spite of my and other warning about what it will not do or do poorly . I be sure it have redeeming quality I have not discover yet - but DO be advise that get to any level of basic useability , you will be spend another $ 75 + buck just for continental US road map . Topo or international will set you back more . consider buy a unit where this be include .