What I've seen this software do is startlingly amazing. Also, file sizes are cut in half. No worries about history. It's like no more karma, the past doesn't matter. Move forward from here!
The saying "Beauty is skin-deep" is backwards with KC. The beauty lies beneath a truly ugly exterior. There's incredible power here, but it's not easily accessed and taken advantage of. A clean UI would do wonders for this software. I realize most CAD and other complex software has troubles with UI but this needs professional help. I look forward to UI improvements in future versions.
The learning curve is formidable. The UI is outdated and user-hostile. The tutorials have errors and omissions (imagine learning your ABC's with errors and omissions). The help system looks like it was generated with an automated indexing routine and laid out like an open source project. Some of the YouTube videos are awe-inspiring, but the basics are not clear at all.
I've used solid modeling software for 20 years and needed to move up to a more powerful package. I took almost 2 years to decide on direct modeling with KC. No regrets, but these are the issues I'm up against as a beginner. Software this powerful deserves the resources needed to make it easy to learn and use.
If you use a Mac like I do, get Windows running in BootCamp and get familiar with that if you aren't already. BootCamp is free, included in MacOS and lets you run Windows on a Mac. Also, you can download Windows 10 free from Microsoft and run it without authenticating unless and until you want to personalize it. I've found that I've been able to personalize quite a lot in Windows 10 without authentication. Basically you get to set it up and try it for an unlimited amount of time for free.
Get Windows 10 up and running and get a feel for it before installing KeyCreator. There is a daunting learning curve in KeyCreator and struggling with a new OS will make it worse. Get your mouse and keyboard working properly and get familiar with the new setup.
Keep it simple and use the Edge browser and a pdf reader. You'll need it for reading the tutorials.
I tried Parallels to run Windows on top of Mac (to run Windows in a window in a Mac) but the basic version of Parallels isn't suited to this powerful software. It won't access large amounts of RAM (I have 32 GB) and it's slow. Time Machine backups slow things down even more, and if you have automatic cloud backups like SugarSync, it can bog down even worse. I had other issues with Parallels and until they remove the restriction on how much RAM it will use, and remove some marketing schemes to get you to install unnecessary software, I cannot recommend it for using KeyCreator.
Once you have BootCamp, Windows, and KeyCreator installed your Mac can run like a Windows PC or like a Mac, but not both at the same time.
FIY, you can use a thumb drive to move existing CAD files from the Mac partition to the Windows partition using .sat or .obj or any other suitable format.
Once you have your system situated you can get going on tutorials whether you have a demo version or purchase KC outright.
My CAD files became large and complex, and history trees were failing so I'd have to start from scratch to fix things. There were other issues too. The first thing I did after installing KC was import a huge assembly with some gnarly geometry. Success! The file now opens and saves more than 20X faster than before and is ready to be worked on without regard to history!
I started to explore all the new tools at my disposal but quickly realized I need to go through tutorials to be able to do real work. That's when I hit the wall.