I concur with v105, myself also being an ex ZA-er.
ZA was a blessing when I started using it 10 or more years ago, still on a dial-up. It was quite a revelation back then to see all sorts of things that got caught in the firewall afterwards (and going, how could we ever lived without it before). Anyhow, years went by, and ZA was lagging behind - especially after having been acquired by Checkpoint. I tried a few other options every now and then, but none of them was convincing enough for me to quit ZA completely. A few months ago I updated to ZA v10, which promised improvements, but it seemed like a very bad joke, so I went back to the latest v9 promptly, and realized they aren't going anywhere and I'd have to look into other options, this time for good. Eventually I came across Comodo, which - this time around - was way better than when I first encountered it. I decided to stick with it; the rest is history.
My only fear is that the way things work in the human universe, Comodo may one day be sold to a giant corporation, and it will only go down afterwards (as it's been the case with many other decent product/solutions).