Yes, I have quite a bit of experience with this device, but I am a bit depressed about this right now, so I have been staying away from these threads. I was telling someone the other day, that I really am going to miss this thing if the service goes away.
Here's my dashboard from a few minutes ago.
Basically, when this device is running a good disk, it has been the best thing I have owned for my tank. The insights that I have gained over the last three months are unmatched by anything else that I have used. When it has a bad disk, it is less useful, because it may be a little off for a parameter or two. About 1/2 of the time that I have been running my device it has been spot on, while the other half of the time, there has been a parameter issue of some kind.
Here's my speculation regarding what is going on.
Yes, they did have a beta program that was successful. It was easier for them to produce disks on a smaller scale and put them through an extensive QC process. The issue they ran into was when they scaled up production of the disks, and they started dealing with QC issues. They were pushed to launch earlier than they wanted to, but they had a scaled up production process that they had tested and thought was working well enough when they launched. Their new production process ended up producing lots of bad disks. Enough people got bad disks that they had to stop everything and try to fix, and then change their disk production process. I heard rumors of the development of an automated system with a robot, but it seems that didn't get finished. I expect them to make an announcement soon regarding the way forward---whether there is one or not.