I like to put my hands closer on the bar as it helps tighten up my upper back and force more thoracic extension..

Other than that, looks good to me but I'm not an expert. I'd probably go like 2 inches lower.
Will try placing my hands closer next time. As for depth, I try and get as low as I can but everytime I go lower then parallel my knees feel like theyre about to rip right out. I actually put on my neoprene knee wraps after the 4th set i think