Rusty,
Can't speak from direct experience of Genna's course, though I have seen him fly a couple of times, and he's remarkable.
I am part way through a conversion course with a different instructor, Ian Austin, of Globaltec. Let me say I have heard only good things about both Ian or Genna, my choice was simply because Ian is based in Cambridgeshire and nearer to where my syndicate is based.
Ian does a substantial ground briefing - he is also an engineer and packs in a lot of understanding about the systems and why certain things have to be done the way the are done.
The kind of ground you should expect to cover in the air is:
1. T/O Std
2. Taxiing/wind
3. T/O Soft field
4. Propeller operation
5. Use of gear and flap
6. Demonstrate Inertia climb
7. Demonstrate Inertia S & L.
8. Spinning std
9. Picking up wing at stall
10. Stall, flap & U/C in turn
11. Dynamic stall in turn
12. Dynamic stall in dive
13. PFL/ glide approaches
14. EFATO
15. Landings std
16. Flapless
17. X-wind
18. U/C failure procedure
19. Side-slip
20. Recovery from vertical
21. Knife edge
22. Wing over
23. Flat spin
Obviously you can add more or less whatever aerobatics you like to that.
From what I gather checkout times vary considerably depending on the nature of previous experience, and the amount of homework reading you've done on the aircraft and its engine - it's a very good time to remember "never learn something in the air if you could learn it on the ground". I would have thought that you'd have to be pretty good to get away with less than 5 hrs, and that if you weren't OK by 10 hours, the Yak might not be the aeroplane for you. I'm only part way through but will come back and tell you how many hours it took when I'm cleared for solo on type.
If you want to have a long term relationship with a Yak get a good military flying suit - you will be grateful for the pockets!
I'm using my own syndicated aircraft and I believe Genna uses his own, that makes it hard to give you any sensible guidance on costs. I reckon, though, that this is one of those times in aviation when you have to look at it as high value for money rather than low cost.