I bought a set of those years ago, they suck. Like
@mrblaine said, they just tip over at the most gentle of drawer closings. I ended up taking a scrap piece of project board, drilled a bunch of holes in a line across it, then cut 1" dowel pieces & glued them in there to make a post for the sockets. It's worked great for me going on about 15 years now.
For my mobile cart I screwed a few magnet rails to a piece of wood & I have sockets lined up in there. That actually works much better because the sockets don't go anywhere at all. One of these days I'll do the same thing to my roll aways.
As far as the foam goes, no thanks. We do it in the aircraft industry for maintenance boxes, but those boxes get pushed all over God's green earth on a regular basis, and that particular system is also needed for tool accountability. After every job each tool needs to be back in the box & accounted for so we know nothing got left in a jet. Doesn't really translate to my garage. I personally use, break, & change tools way to often to have to deal with cutting foam every time I add something that's a slightly different shape. Also I'm busy & if I leave a set of vice grips somewhere I can't remember I don't really care.