I have not had many problems with CAC scripts. I was occasionally "losing" an account (the member's account blanks out) every now and then, which aparently happens with CAC - I don't know if it happens at others. BUT, I back up my data base twice a week, so I caught them very quickly and restored them - 99.5% before the member even knows that it happened. I also got Ian's "fix" for that problem and have not had it happen since.
I actually like these scripts, they are easy to use, easy to edit, etc. But, I have no experience at all with any other kind of script. I have seen some features with other programs that I would like to have, but I do like my scripts. Other than the problem mentioned above, I have had no problems at all with this script.
Frank does do updates to fix "bugs" and offer additional features and he offers all of these updates for free. He isn't the fastest at creating the upgrades, but he is doing it. What he doesn't do, I find elsewhere - Ian