I have a G-11 and an Sbig St200xm, a great mount and camera but have had problems getting consistent guiding due to the difficult in acquiring and keeping guide stars when shooting through filters. I bought this Awesome Autoguider package and had immediate, incredible results. The camera sets up easily and has a large display that shows plenty of stars. It automatically calibrates the mount and then starts guiding. My first image was an experiment, I used ten minute exposures and had perfect round stars the first time out. My next night out I shot 4 ea, 4minute LRGB images without stopping. I just set the unit and went in the house (cold outside. The result was the best set of exposures I've ever had. Perfect round stars, never a problem. This is the best money I've spent in a long time. I also bought the Astrodon CLS imaging filter and it makes shooting from the city a cinch, what a package!