Compared to where it was in 2006 and prior, the sim itself is pretty good right now. (If you weren't on the site back then, you won't understand the halycon days of Rafer Alston, Stew Johnson, and Steve Kerr.) The games are more realistic, and the additional stats they added in early 2009 (I think) like usage, eFG%, etc. have been positive changes.
The general frustration evident in these forums stems from the absolute neglect of the sim and the blatant disdain for our concerns therein. Taking three months to release the 09-10 players when they were promised in early June is simply unacceptable. WIS shows absolutely no empathy, and they are not making the slightest effort to address our frustrations or provide us with sufficient restitution for our continued, albeit very frayed, patience.
They should provide ANYONE who has purchased even one NBA sim team in the last 3 months a free 6-pack of teams for this delay. Will they? Of course not. I'm sure we'll see a promotion as soon as the 09-10 players are finally released, boasting about the "newly upgraded NBA sim," and they'll give a free team to every new user who has never purchased a NBA sim team, but existing users will get jack squat. They'll use lying and deception to attract new customers and neglect and disregard to scare away existing customers.