PTC Creo 9: good on some things, bad on a lot of others...

I'm a PTC Creo 9 user since 2008 (it was called Wildfire, back then). In my experience, it's hard to use, doesn't remember most of the settings (i.e. if I need to save something on a specific folder, everytime I'll have to give file type, complete folder etc...), doesn't have autosave, doesn't show a clear message when it has problem saving, doesn't show a message about files not saved if it's replacing a file (i.e. if you change an attribute, it will replace the file that you have on screen and if you didn't saved it before you basically lose the work), it's slow and hard to draw in 2D. In my experience, sometimes it feels connections between *.drw files and files that doesn't exist anymore and can't be removed, sometimes it gives errors so generic that you don't even know where to start. It doesn't have multiprocessor ability (it has just regeneration multiprocessor). I feel it's like a CAD locked in the nineties and proud of it. It's not user-friendly. In my opinion, it's a CAD that doesn't help you, YOU have to remember a lot of things to avoid problems and do a lot of things again and again to work with it. I feel it's basically working against you.
PRO TIP: If it starts regenerating and it's taking some time, don't click continuously mouse buttons or keys, or it will crash.