This is a very subjective question, so it makes it a bit hard to answer. We've never done comparison charts against other software, because honestly, comparison charts usually misrepresent the competition, unless you are extremely familiar with their software.
So, honestly, I can't say why it's better than VB or IPB, since I don't know much about either product.
As for stability. We're just about 10 years old and we have a pretty large customer base, so I don't really think stability is an issue.
I could rattle off some of our features, but you'll find that on our feature list page, minus the new stuff in this version like the built-in gallery.
As you can see, I'm not a sales person, just the developer. We try and focus more on what our existing customers want/need rather than what will attract new customers in mass. So, that is one of our PROs I guess is that we really try to listen to our current customer base and what they want.
