Version 8.0.2 is being used by many people and seems pretty stable. The only real spot I see as slow is Imported Items with charts that have hundreds of items (using since 2001) - Many of the new features are good and there really looks like no way they can upgrade to ICD 10 without forcing upgrade. I think you will not have any major problems and I have been amazed that AC has not done this before - trying to support 5 different versions in support is awful.
