I have been using Autodesk software and not being American, maintains that this is one of the few good things coming from the big US of A - the others are root beer, jelly beans, and Camerion Diaz. We are a reseller doing a whole host of industrial type software and have certified application engineers not just for Inv but also ACAD, Pro-E, SW, Solid Edge, Catia, and some other obscure bits of code.
I run Inv 11 with my content centre, design acc, vault 5 and sometimes have an ACAD window open at the same time. My laptop specs are 2 gig ram, a radeon card with 128 ram, 1.8 ghz processor and the rest is basically standard stuff. Doing demo's - sometimes on the fly - is very brave but touch wood, i still have to crash and burn. Have crashed it on some complex assembly making dumb mistakes like constraining to the (obviously) wrong features or iparts, but that is a human error, nothing to do with IV.
In a previous co i was a designer tasked with petroleum product used in filling stations. I investigated a whole bunch of software, including sw and decided the migration and learning curve till we reach full productivity will be easiest with IV - that was version 9 and they are still using IV having happily upgraded to 11.
Finally, we have done comparisons on clickrates between most of the abovementioned software in a controlled experiment and Inventor kicked the c..p out of the rest having less steps to take to complete a full part, assembly and drawing - and we have used exactly the same for all the software (supplied by a customer at random).
I am extremely happy with using Inventor doing a lot of modelling - approximately 30 hours per week and the new or improved features really made me happy. And I amtalking about the frame generator, improved lofting and projecting features to curved planes, etc...... and including Vault 5. Enjoy yourselves.
Cheers time for a beer.