I wasn't sold on Brown.
I had watched him play a bunch of times on PAC12 Network last year, and wasn't impressed.
One game at AZ which Danny attended and Walton did the PAC12N coverage on, he especially looked unimpressive. Walton was raving about him, though in a really strong way and made a big deal about Ainge being there at the game.
Turns out Cal's offensive scheme(s) (if there were more than 1) really sucked in the half court. The coach had Jaylen in the corner at the 3point line and had him either shoot or drive, with no motion in the offense. Jaylen forced a lot on his drives, often keyed on with 2-3 guys on the D and would barrel into the lane either pushing off with his arm or lowering his shoulder for the O foul.
Lucky for us Ainge saw a lot more than others, me especially.
EDIT: In retrospect, I'm not sure that I would trade him right now for anyone in that class, considering Simmons injury.