Just got it recently myself. The dimensions are 210mm x 150mm x 87mm with stick lever according to the datasheet which is in terms of length and width slightly bigger than a DVD case. Weight is 0.5kg. Cable length 2.5m. Buttons are about 20mm big.
Not sure about build quality, but from first glance it seems ok. Not a stick user myself though.
Nice, might be worth a try even if it can't be modded. Still trying to decide between that and the FC4.
Isn't that mini $40 Hori stick one of their ones that's far, far too small to install any kind of real parts, with tiny baby buttons?
DOh. Didn't think about button diameter in terms of modding.