i have only heard and experienced good things with the kessler
my friend has a yanni 901 and, after 6 months of him being very careful with it the LH pinky table keys were bent over each other from the shape of the case and the second octave pip came unsoldered and fell straight off.
my friend has a yanni 901 and, after 6 months of him being very careful with it the LH pinky table keys were bent over each other from the shape of the case and the second octave pip came unsoldered and fell straight off.