I attended the most recent Tormach workshop. I found it incredibly useful.
First, a little background on myself to help place my comments into context. I have done some woodworking and reading about metalworking, but I've never turned or milled metal before. I'm a software engineer/architect who has worked in 3D graphics, so the first 'C' in "CNC Mill" is not an issue - all the other letters were new, so to speak :-)
In the workshop, you spend nearly all the time in a work room that has three Tormach mills. Our class was supposed to have 7 students, but one didn't show. Typically, two of the mills were in use by students and the third was either used by us as well or was set up to demonstrate various things - more on this in a moment.
Every student runs the mill for all the steps needed to machine their parts. If you saw the Stirling engine on the Tormach website, we made the top & bottom plates, the flywheel, and a somewhat complex part that sits on the top plate, anchors the flywheel support tower, and through which the piston and another rod pass (my apologies if my description is imprecise). While making these parts, we used step & custom soft jaws in a vice, anchored parts to sacrifical backing plates with screws & washers, and used other holding clamps to fix the workpieces. There were a number of alignment tasks that to be done, either for every part or for the first of a short 'run' of parts - measuring & entering tool heights, finding centers in several ways (with the point of a tool, with a rotating edge finder), finding the top of parts to establish a Z reference, aligning the vice with the mill table, finding the center of a hole using a dial indicator, establishing two different coordinate systems to work with one program at two different work-holding stations - I may have forgotten one or two along the way. By the time the class was over, I think everyone had a chance to perform each task, and those who have never done them before are encouraged or volunteered to go first.
Tool wise, we used a number of different tools in Tormach tool holders - end mills of various diameters and styles, drills, a center/chamfer drill, a face mill with insert tooling, a reamer, a tension/compression tapping head. The piece with the long description above used 13 different tools, the others fewer.
During the class sessions, there was always one seasoned machinist there to help, advise, and answer questions. We were encouraged to ask any and all questions, be they pertinent to the project or not. We were often shown several techniques to accomplish the same task.
We were also encouraged to ask to see demonstrations of any equipment that wasn't part of the class. Thinking back, we saw some work done on the Duality lathe, some other insert tooling at work, the measuring probe, some of the wizards in the machine controller, examples of how one works in SprutCAM, that sort of thing.
I'd characterize the tone of the workshop as teaching you the practical aspects of making competent parts.
At the start of the workshop, it was made clear that some mistakes would happen, which was good - it helped us to see how to handle issues that might arise in the real world without having to contrive fake problems. For example, an order that was supposed to have contained center cutting end mills apparently had non-center cutting end mills - the attendant noise from one plowing into aluminum showed us all that something was wrong, and we saw how to safely stop the machine and get back to resuming the program from a safe point. It also taught us to carefully examine tools before using them :-)
I could probably go on for a while, but perhaps it would be helpful to pause and see if there are specific aspects you'd like to hear about.
One quick summary: If you're afraid you'll be heading to a set of boring lectures and an intimidating sales pitch, don't be. It's a very relaxed, hands-on several days with the machines and the people at Tormach, surrounded by all the equipment they sell for you to see, touch, and either use or have demonstrated for you.
I hope that helps.