Ran a cycle of the intermediate about 6 months ago. This was the logical strength world progression after 5x5 got gnarly.
I liked it. Light, medium and heavy days made a lot of sense and took my squat about 10kg past my plateau on 5x5. Plus the higher volume set on the heavy squat day (if I remember right? 3 reps max weight then 8 reps lighter weight) felt really right to me. Got a mad training effect from that.
But all that max weight lifting made me slow as a mofo. Ditched it after one cycle to start some VJB sh!t again.