Hybrid Training Splits for Mass

I recently read through the article explaining how to design programs (How to Design a Damn Good Program - Part 1)

My training is geared for size and I was considering using an upper/lower split, until I discovered an Upper/Lower/Body split.

My program looks like this
Mon: Upper
Tues: Lower
Wed: Arms/Shoulders
Thurs: Rest
Fri: Chest/Back
Sat: Legs/Shoulder
Sunday: Rest

What’s your opinion on this type of split? I favoured this as it allows me more time for specialisation in certain areas verses U/L/R/U/L/R/R