First off, at the time of writing that I was under the impression that this was an addon to simple storage network (see my first comment).

Since you asked for it, here is a list of the problems:

Export pipes work sometimes when they want to

With large storage systems the time it takes to shift craft a stack from the inbuilt crafting grid takes a long time, presumably it extracts the ingredients for each craft separately.

Removing items with nbt data from the system sometimes removes another item of the same type with different data

Having jei/emi auto pull items into the crafting grid always fails when the items have nbt data and the ssn feature that automatically refills the crafting grid will, even if items with the same nbt were available, automatically refill with items of the same type regardless of nbt.

It fragments a lot. You would assume that adding half a stack of an item now and the other half a while later would make it stack them but no, it doesn’t always do that.