Glad you like it!
It's Joe Mills' program.
Are you using power sn/cln or full lifts? This program works extremely well to get used to cathing the bar low.
And if you're ever trying to max out - after 15 reps prescribed - start adding 2.5 kilos for singles till the first miss. It's a really weird but cool experience. Tired as hell, yet you'll be really close to your pr's if not surpassing them.
Do it once every 2-3 weeks.