"Freestyle 10x5 for mass AND strength

Mon BP 10x5 (sets x reps)
Tues DL 10x5
Wed BP 10x5
Thu SQ 5-10x5
Fri BP 10x5
Sat DL 10x5

Start at 50%-60% of your max."

interesting - is this from the Westside folks? It's pretty powerlift centric.

why not mix in something for the back instead of 3 days of BP?

I don't know where it originated (I believe from Pavel), but it is similar to what you might see at Westside. It focuses on these three lifts since they are the primary powerlifting exercises. Supplemental exercises could be thrown in, but are usually incorporated at a different time. It does look a little light on back, but DL is probably the single best back exercise you can find. I usually always manage to get at least a few reps of pull-ups.

having 3 days of heavy BP seemed to unbalance the DL & SQ work to me. 3 days of upper body - OK - but all BP seemed unbalanced.

A day of pullups or better yet rows would seem a better mix. But then I have rotator cuff "issues" and have to make sure and not overdo heavy BP to the exclusion of pulling exercises.

I depends on how you do it. I've benched as much as 5x/week without a problem. I don't think it's imbalanced at all considering the work your legs get with the DL.

looks like a hardgainer routine

Yay! i like those types of workouts. Fast and effective. I'm definitely a "powerlift- centric" type of girl.
I've added an extra workout in addition to my regular lifting schedule (on my off days, at least once a week) that is similar-
the past couple weeks it's been box squats 9 (or10)x5, at 100 & 105 lbs. along with 20 (55 lb.) kettlebell swings in between sets. It sure beats a half an hour on the boring elliptical trainer for cardio, and doesn't beat me up so much that i can't lift heavy the next day. I was doing this with overhead squats in the past, but that's a little more intense cuz the grip starts to go, with all the kbell swings...That was also a great workout. My waist got tight REAL fast. Overhead squats are the best....

You can vary the bench press by where you hold the bar (close grip, wide grip, regular grip). I love the bench press, but of course have to stop doing the same thing every 2- 3 weeks, and lately i just don't want to stop benching, so i vary the grip, for at least a little change. My numbers are still going up, and until they stop, i'm keeping benching as my main exercise on upper body days.