Sorry to disagree guys .
I have Studio 10+ in addition to Liquid Edition 6.1 and now Avid Liquid 7.
On another partition I have Adobe Premiere Elements 2 ( xmas present) and Sony Vegas 6 + DVD ( complimentary gift for testing).
The systems are a p4 3.0 , 1gig ram, 420g sata HDD and a Geforce fx 6200 256m ram graphics( AGP) and Amd 64 3800, 1.5g ram,300g sata and ATI Radeon 9800 ultra 256 ( both systems have dedicated video drives and Im almost obsessive in keeping them in tip top shape) ie Optimising windows with updates , defragmenting HDD etc
I have found Studio 9+ rather stable and 7 & 8 atrociously unusable.
I got Studio 7 as a "gift " ( from Pinnacle) a few years ago when I bought several Systems with the then Pinnacle Pro one card ( with Premiere 6.5)
As such , I dont have more than say 5-6 years experience with video editing stuff: Adobe Premiere 5 had given me the shivers!!
My current problem with 10+ is that it is slows the PC down and is itself slow when the project is more than 1hr long and then it doesnt seem to offer much functionality over 9+. Otherwise it is stable and easy to use
In comparison, both LE 6.1 and Avid Liquid 7 are very nippy ( on the same machines) as is Adobe Premiere Elements2. Similarly Sony Vegas 6 seems rather unfussed.
The PCs have a multi boot(3) Win Xp ( SP2) configuration and some partitions ( 2/3)are just for editing video with no antivirus etc. So they have "clean" installs of the software.
I honestly feel the good GUI and layout of Studio has won many converts to Video editing.
Sadly a very significant minority have never been able to get it to work ( properly or at all) regardlesss of PC spec. Pinnacle support is quite polite and prompt but ( to say the least) functionally clueless.
As such Studio has equally put off a large no of people from video editing for a long time ( some for ever) which is a shame. This is more annoying because they feel its thier fault as they cannot get it to work. It is of course not thier fault but that of a flaky product.
When Avid took it( Pinnacle) over and promised to use the mature Edition ( now Liquid) engine in studio I was hopeful.( Still am

)
They have now posted 2 major patches ( 60 meg each) to fix it in 2 months and still not everybody is happy.
I dont think its fair to blame the end user here regarding PC specs and housekeeping : Studio is very unreliable and can be undependable

and will perform well or badly regardless of PC spec. It cannot be relied on when deadlines are looming!
That said, I agree no NLE software is perfect but feel sad that Studio seems to be a lost opportunity to be a great all round NLE as its notorious reputation is unfortunately justified !
I own and use it with perhaps less grieve than many but refuse to give it an endorsment

until they tidy it up.