A friend of mine has two 96 bass continental chromatic Vignoni accordions, one is double octave (LMMH) the other musette (LMMM). I've never heard Mel say any thing negative about them and of course they can sound glorious. The double octave instrument with a slightly "drier" tuning works very well for the Breton dance repetoire.
Last summer I bought a 4 voice 34/96 ( Ravel 2) Vignoni PA. LMMM tuning, with a French Musette sound. I went for full decoration, snazzy blue bellows with a subtle bellows diamond. I suppose the quality of the instrument exceeds my average abilities, but in all honesty the winter of 2015/16 was vile for a number of personal reasons, so this was a present to myself for putting up with a lot of &%^$! Having ridden motorcycles for most of my adult life, I cast an eye over a couple of Harley-Davidson motorcycles ( I always wanted an Electra-glide) but frankly with good used models at around £12K and new ones starting round the £21K mark, a new box seems good value. And who wants to be another sad old git on a bike anyway!
Anyway, the keyboard is fast with a light touch, lighter than the 30 key Fantini i'm fortunate enough to have as well. The reeds respond instantly and will sing out as loudly or softly as you could want. The bass responds instantly and I'm told by a mandolin player he can hardly hear his instrument if he sits on my left. C'est la vie, as they say! With all the bass reeds sounding it's been describded as "assertive". Was it worth the price tag? In my opinion yes it was! I won't be buying an instrument like this again. It took 8 or 9 weeks from order to delivery and was supllied by Allodi Accordions in Lewisham. Hope this helps a bit.