I order from them, occasionally.
I've never had a problem with an order. They really do need to ship quicker, though. Some things will go out the next business day after your order, and others won't ship for possibly months. And, it isn't just complete rifles, upper receivers, lower receivers, and special order items, either....
Waiting 3-5 weeks for an "in stock" stripped upper receiver to ship is a bit ridiculous.
But, as I said, I still order from them periodically (mostly for stipped, blemished receivers, or when they have a substantially better price on parts than the competition).
As for that "Where's My Order" thread...
That was started during the mad AR-rush, when EVERYONE had months (even years) worth of backorders for anything AR-related. Now, it has just become a repository for impatient idiots to badmouth PSA and/or waste PSA's time by having them look up orders that were placed only 3 days prior. ...With the occasional order that's overdue for shipment, but still waiting on an item.
Don't worry about that thread.