have done 2 times trips across the europe on my 1st gen jazz ( 2003) , one time around 8000km other 6500km , both took about 2weeks and Not in a single Hotel we stayed in,basicly lived in the car for the whole time, recline the front seats and you get plenty of space for sleeping.
Also I do about 3-4x per year ~2500km trips on regular basis, not once it has let me down.
Now im actually planing a trip from UK to Indonesia, about 30,000 Km total Both ways ,however not sure if I should use my trusty jazz or get a 4x4 since the jazz isn't particular good offroader,maybe with good mud tires?