That is great news GG, if 5.1 smooths out the kinks and sandboxing works well then color me impressed. Sandboxie is awesome but I'll agree it isn't what I would call easy to use, it is not easy to suggest it because it overwhelms or confuses the general population too much to be of use to me, maybe Avast can fill that spot. Love the cloud inclusion and it seems it won't be long till we can see an improvement with Aug/Sept not being that far off really. I don't see them adding much more to the free version if anything with exception to improving what is already there but I may just make the effort to hold out and see how 5.1 does, Avira has me a bit let down so I don't really have anywhere to turn since Emsisoft is working on their recent acquisition to provide x64 support. Thanks for the heads up GG!
...vulnerabilities were already solved in the 5.0.594 Some but not all, definitely a big improvement though from what I am seeing.
EDIT: Just wanted to thank you GG for that video link, Avast did very well with the sandbox it seems, you make any others that tests the other aspects by chance? Web and Behavior are really topping my list along with 0 day detection (which being cloud based will help a great deal). Thanks!