It looks really powerful. Check out also the range of free EDA software in the Wikipedia article at https://en.wikipedia.org/wiki/Compariso ... A_software
My own CAD (Easy-PC Professional from Number One Systems in England) is so old it runs under DOS; but it gives me the tools and freedom to do things the software writers didn't anticipate any customers doing with it, since I'm resourceful and also know the gerber 274X standard so I can tweak a few things in the gerber files after they're formed. I did our company's most complex board ever in 1994, with 500 components on a 12-layer board, on a 16MHz '286 with 1MB (not GB) of RAM, and the program and the data all fit in memory at once.
Edit, 10/1/18: I'm putting an image of it from the gerber viewer here. Since it has been out of production for about ten years now, it shouldn't be any threat regarding competitors stealing secrets. It's mostly analog, so it had a lot of resistors and capacitors, plus a lot of diodes in the control circuits. There are 30 ICs there (mostly DIPs) and three relays and a DB-37 connector, and the resistors and diodes are mostly under
the DIP ICs. There are almost no vias.
It's the middle board in this sandwich which fits into a box that's 4" x 5" x 1.75":
The densest thru-hole design I ever did achieved an average of 45 parts per square inch. (The one shows above is not quite that dense.) Today of course our boards are all surface-mount, except connectors that take a lot of force when things are plugged in or unplugged. <End of edit, 10/1/18>
At my last place of work (ending in 1992), we used OrCAD, and it had more bugs than an ant hill, and it also kept trying to second-guess what we were trying to do and telling us essentially, "You can't do that" since it didn't understand our unorthodox methods to get more on a board. I just wanted to yell at it, "Yes, I can, and I know what I'm doing, so just shut up and do it!" Easy-PC Pro doesn't breathe down my neck like that.
Gerber 274X wasn't out yet when this CAD came out, or even at the time of the last update, so I learned to convert the older 274D to 274X which is really quick to do by hand in a text editor for most layers after you have your templates made up.
So why do I stick with such an old one? It's partly that I don't want to re-make all my custom components for another CAD. The Circuit Maker page you linked to says it has hundreds of thousands of components. My came with loads (maybe thousands), but I re-made them to get better board density. I have the book "SMT High-Density Design & DFM" from SMT Plus, Inc. which we paid a hefty price for; but these people's ideas of high density is pretty lame IMO. Looking at the capabilities of our PCB suppliers and assemblers, I have done a lot of revising of the parts' footprints, and we have not had any
production or reliability problems whatsoever.