later versions do allow partialpostcode entry ie AB12 3 but I find it's still better to put the town & then the street. You don't have to put the intersection, just click on 'quit' and it'll find the requested street. Obviously, roads that are major thoroughfares, and are miles long, can pose a problem compared to TomTom that'll take you to a house number .... ish
Exactly like the crappy TomTom and similar units, the CARiN will prompt for an intersection if the digital map does not have road numbers for that street.
The issue with the CARiN unit fitted to early Omegas is its age - the last map made was 2007/2008, and with the later maps, its slloooowwww to enter an address and calc initial route (once route calculated, its fabulous, including recalculations).
My TomTom unit finally died when it screwed me over several times around central Birmingham, as it couldn't get a GPS signal. Fortunately, I remembered to open the window first.
I only ever use the NCDx in my 2 Omegas now - similar feature set to the CARiN, but faster, and current maps available (for now).
Don't get me wrong, portable units like TomTom have their uses, but quite simply aren't a patch on (even old) car based systems. And thats before I get onto my rant about how drivers sticking gonks on their windscreens should be banned from driving. Its worth £50 to have it on the phone for when I'm in someone else's car, or on the bike.