I used them before they "went out of business/re-bought" or however you want to say it.
It used to be a great system, all in one router/firewall/HA server. Then the lead dev got a job doing commercial building automation and the Cortexa just faded away. One of the users liked it so much he bought the system from the lead dev but they brought on a new dev who had little to no HA experience and, as would be expected, the system suffered. It never has reached a state where it can be competitive again. Now they keep trying to cut expenses more and more, can't blame them, but again, the system is suffering from this. They seem to have gone "Apple" crazy for some reason so I guess if you like Apple products it might be for you. I was given a login to a test system they had set up a while back and they still had a LOT of work to do just to bring it up to a "production" type of system, not sure if they ever got any further with it or not but I would ask to play with this test system before spending any money on it. They really should have kept the older system and did the needed upgrades to it instead of trying to revamp it. It was all drop down based, point and click type of programming, couldn't be any easier and user friendly! If you added a UPB driver, the automation programming section would then populate with all available UPB functions. The test system I used was trying to mimic this feature but it was sloppy and confusing and the navigation was just all over the place, kinda weird.
It's just not what it used to be and this can be taken as a good and bad cuz the real Cortexa did need a lot of updating but they didn't do the updating needed unfortunately.
As always, this is just my opinion from using the old and new system, as I said, ask for access to the test system and play with it or check on their return policy and get one for yourself. Just because I didn't like it doesn't mean you won't.
Also, I know they did bring on another dev who was much more knowledgeable in the HA field.