Sounds like I train similar to you but I havent done twice a week in nearly 20 years.....
I hadn`t either until this past April...I really liked it.
At first it was tough,but once my body became accustomed to it,it was great.
I would do my whole body over 3 days time,Legs,Chest + Back,then Delts and Arms,repeated a bit lighter the next three days using different exercises and at times intensity techniques such as super-sets,tri-sets,drop-sets,etc. etc.