Sheiko advanced medium load is actually pretty insane with intensity. Fatigue really kicks in hard in week 4 and his box deadlifts are simply too tough, I had to skip them due to exhaustion. I replaced board press with paused bench press myself since I never had lockout problems on the bench (and I don't train equipped). Overall I think the intensity is definitely high enough since you're doing so much workouts each week and you're training either the deadlift or squat every day. I feel like the bench volume is the easiest to handle .. but it does do wonders for my bench despite the workouts feeling very doable.

If you're a complete NEET I recommend this program as you're 4 days / week in the gym and the sessions are usually between 2 to 3 hours. Maybe the saturday session is 1.5 - 2 hours.Since you're doing quite a bit of volume your heart rate will also be elevated and you shouldn't expect to be able to sleep 1-2 hours after the gym. This can be quite difficult to run with an ordinary 9-5 schedule and it'll require proper meal planning.

I also recommend to follow the rules that Sheiko listed in his book when doing the program and adjusting it here and there to your own needs. For example there is a lot of lockout work for the bench press and deadlift but if those aren't your weakpoints you might want to chance around the chains / bands exercises and the board press + block pull.

Overall I'm enjoying the program. I actually loaded 132.5kg and it flew off of it. That wasn't the case before I ran the program I remember struggling and grinding with poor form a 127.5kg paused bench 3 months ago. I think in these 3.5 weeks of doing this program I def gained at least around 2.5kg on all lifts. It makes me work at a frequency / volume that I've only done when initially I was doing bodybuilding style workouts. But that wasn't big 3 volume but accessory spam / chasing the pump. I think this program is extremely solid if you want to bodybuild and also get stronger.