I know someone who had one (saloon) and he said it was rubbish and just understeered everywhere. This would support your statement of them feeling very planted at high speed though I suppose.
The understeer is probably nothing a set of uprated ARB's wouldnt sort out though.
They arent built for twisties though as already stated, pretty much one of the best long distance cruisers going IMO.
It is worth noting that I have never driven one, so my opinion is only based on what I have heard from those who have!