Pre Pac Storage Units

Anyone had any experience with O'Brien's Inner space Drawers which can be brought as a pre pac unit to DIY assemble. These are made by O'Brien's Camper trailers and can be custom made. The Platinum drop fridge slide opens up the possibility of a 4 drawer unit with fridge on top or two deep drawers and fridge on top. The custom made Pre Pack offer seems a good compromise as it is all complete. no chasing around for bits and the timber will be professionally cut to size. Just planning to use it for camping storage so it doesn't need to be of industrial strength. A search on this site did not reveal anything about the drawers although the O'Brien's Campers seem well regarded and I have wondered why..........Thanks Peter