Like about GeoPro:
Easy to use.
Quick, similar to using a calculator, as opposed to a software program.
Variety of computations for a reasonable price.
Don't like about Geopro:
Not very flexible.
Limited input & output.
For your purposes, it sounds like Geopro might be what you're after.
I am a structural, not a geotech, and I'm usually designing piles (lateral and vertical), sheeted excavations, bulkheads, etc., and that's why I prefer Ensoft and CivilTech. These provide me with more input flexibility and increased output for my analyses.
Interestingly, sometimes I use GeoPro for a preliminary modelling of the lateral pressures, so that I have a better feel for the forces involved.