Been using Simulate hard for 2 years now. Have gotten a lot of very complex and useful analyses from Simulate BUT I have also paid a dear price since upgrading to Creo 1.0. My models corrupt and become completely unusable with no forewarning and no recourse. This happens only with optimization analyses... normal analyses are unaffected.
Last night had an optimization run successfully ONCE... then when I went to edit it all rows in the "Design Limits" field were gone. Spent ours trying reconstruction and other workarounds. Nothing brings the model back to life.
I know at least one other very experienced user that says this happens too often. This has happened often enough that I am actually "on-the-fence" as to whether companies should use simulate for optimization. It's "bad business" to put hours into creating a model knowing that at anytime the model can become completely worthless. What's the incentive to re-creating it when it can (and will) happen all over again.