Holds up fine. Some of the boxes I had at work were around 10 yrs old and the foam was still fine in them. This stuff gets beat up too. 10 yr old Snap On box... drawers barely close, lucky if the wheels are round and there is a side that straight still.
It's just a real pain to setup the foam plus if you add or delete tools it's a pain then too. Also takes ALOT more space vs having tools in a drawer. If I did the foam in my box I would easily need a 2nd box the same size.
I have a good idea of what tools I have so I don't usually loose stuff. In the ~15 yrs I have been turning wrenches, I have lost a 10mm gearwrench, 10mm 1/4" socket, 1/4 ratchet and 1/4" extension and a 14mm 3/8" socket. The 1/4" stuff I left on top of the battery in my Jeep and I took it for a test drive. When I thought of it, it was long gone and never found it. The wrench and socket... no idea where they went!