Passlogix started out in the single sign-on (SSO) business and SSO was a bit of an oxymoron at the time. Many approaches had been considered and Passlogix addressed the problem at the enterprise level in 1996. So, while these products haven't been around quite 20 years, they certainly have dominated the access management market for a big chunk of that time.
Testing a big system usually poses interesting challenges in the SC Lab. Setting up and testing the v-GO products, however, has never posed that level of difficulty for us. Users in real-world deployments we have talked to recount the same sort of experience.
For its simplicity, comprehensive feature set and ease of use, we add v-GO to the list. But, that should not be a surprise to our readers. V-GO products have received several of our our Best Buys and have routinely received five stars in our reviews.