Not to be the bearer of bad news but my mid-schooler DD (7th grade 12 years old) said that the LL Bean Deluxe backpack is very uncool. I bought one for each of the kids on clearance that were used last year. The deluxe bags are large and do hold lots of books and the don't break! I was really surprised that the shoulder straps didn't tear.
Anyway, I bought another one for DD for this year (also on clearance) and when she found out that she was going to have LL Bean again, she begged me to get something else. She said she got teased by some of the kids last year because her backpack had a reflector strip on the pocket. The boys would pass her and say, "Nice reflectors" which also meant they were being sarcastic about other body parts, but teasing her about the backpack at the same time.
She said it was "way uncool" to have a "baby backpack" with reflectors and lights in middle school. I have that new backpack listed on ebay right now. and luckily I will make almost 4 times what I paid for it. I learned my lesson about buying before checking with her.
DD chose a Jansport this year that I got a great bargain on at Kohl's. I will come out ahead with the sale of the LL Bean backpack. I hope it holds up as well as the LL Bean backpack.