I have used PHD for years. That's the first and only program I ever used for guiding so I can't really compare. IMHO guiding is the icing on the cake. Doesn't matter what software you use. If your mount can't react exactly to guiding pulses because of mechanical limitations or can't track properly on its own for a
reasonable amount of time there is no guiding program that's going to "correct it all" for you. I think over time people have become too reliant on auto-guiding and cut corners in setting up more and more often ...... myself included
