While this shows great progress and a lot of bugs fixed, it is my strong recommendation to wait for 7.1 or 7.2. There are still a lot of bugs that need to be addressed before we can stand behind it. And a lot more bugs will be found as Vtiger 7 is deployed for production purposes. Sit tight for 3-6 months.
Still, there is reason to be excited. I think the UI is much improved with this release and it will be worth the wait.
Note: the migration script is not through QA yet, so if you are upgrading your current build – don’t do it yet.