I think $189 for a drawer unit with a 60 pound load capacity is on the pricey side but, I've looked at the modular systems from afar without actually using them. Tool carts and bottom rollaways seem more useful to me. However, if you have a requirement for a small footprint and mobility, I can see these being useful. I'd have to see them in person though as I don't have immense confidence in the SK brand these days.

They are a nice shade of green.