It still has bugs that cause it to crash on some machines. I'm hopeful that they will get it fixed because it looks like it will be a pretty comprehensive tool but right now I'm still somewhat disappointed.
When I get a solution out of it (if I turn off the graphics capabilities I get it to work about 95% of the time, with the graphics capabilites turned on it works about 50% of the time) I spend quite a bit of effort verifying the results.
I think the programming bugs have left me wondering if the engineering results are similarly buggy but I haven't found any major problems with the results yet. My confidence in V6 hasn't grown quite yet.