My 2 cents, I know I’m not a member anymore, but my experience with S3D has been mostly negative.
I went halfsies on a license with a member of MakeXYZ a couple years ago and I had the software installed for around a year but I only used it for around a week. The support feature is sorta cool, and it definitely worked, but thats about the only thing that did for me. I had been using Cura or KISS, and trying to emulate the settings I used there was an immediate downgrade in quality. I put some effort into tuning the profile for my printer, but considering that the slicer I was using before “just works” I decided to just leave it alone and go back to what I knew works.
If that isn’t enough, S3D (the company) has a history of being difficult. There have been several large issues caused by the software that they elected to ignore (and even censored a few of the posts on their forum), and I’ve heard that they are a bit slow to implement features requested by the (paying) community. I’m not sure if this issue is resolved, but at one time it would generate a lot of small segmented moves on some geometries that would cause Smoothieware to stutter. There was another bug where 100% infill would leave gaps, so to “fix” that they allowed the user to set the infill % to above 100%.
TLDR/Regardless of all this, I think $150 is a pretty steep price tag for 1 selling feature, and I would advise you to not purchase this product. Cura has had a lot of advancements recently due to increased efforts from Ultimaker (version 2.5 was released today), and even Slic3r is a pretty good slicer with a pretty active community, both of which are completely Open Source and free to use with their own unique features.