No I been using Gstbl7 and Slide 5 a lot for last 2 years. In slide I know that you can do many more things, but the only problem with slide 5 is there are no limitations of things you can possibly do to make structure safe.. I run the sections with modifying buttress n I got FOS more than 1.5 ( which was my requirement) but then I got errors too, I got errors like 111, 108, 112, If you keep minimising the error , you need to run that section for 10-15 times. to get errors "Zero" so my concern was, Is there any more sophisticated program available for Slope Stability Analysis of slope