Altea is a decent, and very easy system. It's all clickable (or accessible using F keys), no need to memorise codes etc.
Are you serious?
Ok it is maybe easy to use in the way it's visual but from a user point of view, it's the worst system I've ever used.
I've used SAS Palco, ORCA, CODECO, LH WAB, GAETAN and Altea.
The latter is by far the worse, it looks like it's made by people who have no idea about load planning.