I like Pseudo Effects because it keeps the expressions controls tidy – but it is an unnecessary step.
Here’s the effects control panel for a preset I have saved to get cards to slide out in my comps:

Here’s one that I built using Pseudo Effects maker for an arrow preset:

What it’s doing is combining all the expression controls into a single section(?) / effect (?).
So far, I’ve been getting my effect ready using Expression controls. When I’m happy with the look, I’ll open Pseudo Effects Maker (which is in Windows > Extensions (extensions.png) – which i do find confusing. Then I clear out the existing controls on the left, add in the expression controls I’ve been using and then use the Save / Apply options in the top-right burger menu to add the effect.

What I’m not clear on is whether you have to keep the original effect on its own, or if when you save your final preset it also saves.
It’s a tool that makes things neater – with 10 minute learning curve, but you don’t need it.
http://www.YouTube.com/ShiveringCactus – After Effects Tutorials