there be many thing I like about this unit -- it be very light and compact , and I find it easy to use . I find the base map surprisingly detailed -lrb- for my area -rrb- , and upload the detailed map from MapSend fill in all the tiny road . now the downer : - mapsend need some lovin ' . I can not just pick the ... baud rate I want ; it must `` discover '' it . interestingly , certain mismatch between what it be try and what the 330 be expect make MapSend crash . just let I pick a number , ... - mapsend do not try anything past 19,200 bp . the thing -lrb- supposedly -rrb- work at 115,200 . - still wait for street map of Europe . - it will not plot a -lrb- street -rrb- course for you . not a big deal for I , but if you primary usage be in a car in place you do not know , you 'll probably want one that draw the `` right turn here '' arrow and talk to you , etc. . . since I use it on the water and for hike the 330 's behavior be just fine -lrb- it can draw a straight line from you present position to any desire locale -rrb- .