I use UO Steam for interactive stuff, and EasyUO or Open Easy UO for heaving lifting (anything totally automated and complex)
I do usem the in conjunction to run looters. UOS is amazing for quick dirty stuff. Its biggest limitation is that it only runs one script at a time... which is perfect for PVP/PVM macros, but not so great for running advanced looters, miners, ect.
I am really looking forward to playing with Stealth... I see great potential there.... but I suspect I will still like Steam better for when I am actively playing.
I think everyone in my guild uses Steam as well.