I'm using 17 platinum now. Only had it about a month. I started with version 8 pro. I generally upgrade every third version. I had a need for the sheet metal fold and unfold tools, so I upgraded to 17 plat from 14 pro.
These platinum versions also come with all mechanical tools as well as architectural. They are quite nice. I saw the 18 being offered and it does really bump up the seep, but most of my drawings are rather mild, so don't take that long to render. I will likely wait again about 3 versions before an upgrade if I even do. This one pretty much does everything I need it to do.
I also have a full version of 15 Platinum with several training video CD's and a training manual along with the software guide that is for sale on Ebay. It has never been installed. I did open the box to make sure what the seller claimed was inside, but that is it.
Anyone interested in it here and I will give a better price than what I have it listed for.
Just PM me.
Training CD's like these is what allowed me to learn Turbocad to start with. Still no pro at it, but getting there.