PAN has really good stability, overall. If you subscribe to their support email list you get alerts from them three or four times a week with updates or notifications about bugs. They're on top of it. If I discover a problem they're usually already onto it with a recommendation for a micro upgrade. And then there's the URL filtering - I've never seen an issue that was attributed to it that didn't turn out to be a different root cause or the web site was so new that it hadn't yet been categorized in PAN's URL DB.

The stability is very much better.

This solution has pretty good stability.

The stability is excellent. We've never had to raise any technical issues. There have been no bugs or glitches. It doesn't crash or freeze. 

It's incredibly stable. 

The stability of the solution is good.