I was trying to plan a cycle route from Woking to Brighton.
Google Maps gives me a nice route straight away, selecting the 'pedestrian' option and then choosing the A281 route (shortest).
http://maps.google.co.uk/maps?f=d&source=s_d&saddr=woking&daddr=51.0655136,-0.3397255+to:brighton&hl=en&geocode=FUYIDwMdGHj3_ym3Y9EWGNR1SDF0s0gGuuL5IA%3BFakyCwMd89D6_ylXmVXoROp1SDHw9sytLa4OEw%3BFcJxBwMdHOv9_ylnQSn2CYV1SDH5Dn1yeq_GnA&mra=ltm&dirflg=w&sll=51.09753,-0.339105&sspn=0.786533,1.674042&ie=UTF8&ll=51.122489,-0.43602&spn=0.393053,0.837021&t=h&z=11&via=1
In order to get BaseCamp to follow the same route Google Maps gave me with one click, I needed 20 waypoints, and in several cases the software routes me off the unclassified road I'd selected, turns around and then tries to go back onto the A road, taking in some cases long detours. My road preferences are set to one notch from the left(i.e. one notch from 'minor roads only').