I don't regret it for one moment! Not only I feel the website is safer, but it made me aware on a lot of security issues I didn't know that were such.
It was installed in seconds and even when we had everything set up already, we run into no problem at all. Everything kept working just fine as it was before.
Not only that, I ran into an unrelated to the component issue (that had more to do with my ignorance on how to work the php.ini file) and the ticket submitted was replied within an hour. I also liked that is was assigned to a single staff member (which gives you the feeling they are attending you more personally), and he was very friendly and helfpul.
In my opinion it's worthy every single penny you pay for it; they provide with documentation and tutorials at their website too (which btw looks very professional and organized).
I very much recommend this extension.