My tuppence on the Chadwick bass. I've had mine now for nearly 3 years, probably done close to 100 flights without incident. As far as string life goes it's been fine with spirocores and settles in tune pretty quickly. I had my luthier do some setup work that helped the playability, mainly the bridge which was very thick and dampened the sound too much. Also it's worth mentioning that Charlie Chadwick is more than helpful with updating any improvements, a real gent to deal with.
Having used a heap of EUB's over the years this bass has been a revelation, ok it's not as responsive as my old flatback but it feels similar enough.
The flight case seemed a bit flimsy at first but it's held together pretty well, I tacked on a few strips of carpet to the edges to prolong its life, also I've got away with telling the airlines that it's a cello...doesn't seem to freak them out so much.