It's full-on, but there's a lot to fit in. The courses are basically 4-day modules which are 95% hands-on practical work, plus an optional 1-day theory course on natural stone and the marketing/selling/business side of things (I recommend you do this).
The days are quite long and lunch is usually a working one. 8 0'clock starts and you finish when you get where you need to be - I think 6 pm was my latest.
I did the 2-week course but do the 3 week if you can, as it builds on the work you've already done, and the people I spoke to on the 3-week rated it highly. On week 3 you're given a photograph of the desired result, which is a kitchen mockup to be tiled in herringbone, into window reveals and boxed-in pipework etc.
Week one you're tiling a bathroom mockup. The walls aren't square, the window reveal is out of level. You tile around a sink and a square box on the wall, which you may have to build out, and then you'll fit plastic trims with hand cut 3-way mitres. You also cover setting out of floors and walls.
Lots of other stuff on the 2-week couse. Intro to Impey wetroom trays, uncoupling membranes, prep work etc etc. Too much to remember which is why you get the pages and pages of notes.
Darren's done some YouTube videos where you'll see the bays you'll work in and the projects you'll complete.