High Density, Low Cost, No Frills
Your review: I have a few of these that do a great job of organizing a lot of small to medium sized parts in a small area. Strong enough to hold all of our machined parts which are fairly heavy. You can't beat the value.
Pros: High density. Easy and inexpensive cardboard bins are great. Great value and durable. Some of mine are older and have been abused by completely careless employees - still doing the job without looking bad.
Cons: Its tall and shallow so it needs some additional support to be safe, especially if you end up with a top heavy arrangement. Directions are generic so you gotta figure it out - be prepared to deal with a few bent pieces since the packaging does not stand up to shipping. All of mine have some shipping related damage that needed some effort.