The mod works great for filter inserters and splitters, but would be very nice to add on storage chests.
The suggestion would be according to the belt/assembler/chest it is being inserted into or out of this chest.
Would be useful in malls where I want to output to filtered storage chest. Similarly, for recycling onto a belt/assembler.
Care should be taken that inserters might have non-default pick up and drop off locations (Bob's inserters).