They look great! "Pick and pluck" interior sounds perfect for customising. I would expect they would resist the tendency to keep "picking" and "plucking", which could be messy.
They've thought of everything. I know the topbox on my V-Strom is quite hard to open up a mountain, with sea-level pressure opposing opening it- these boxes have a pressure relief device.
Great price too, and they appear to be as tough as the Pelican original.