I've got one specific reason I use default-deny software and two specific reasons why I use VoodooShield over other default-deny software.
I currently use VS Pro by itself; have done so since the beginning of the year (and have used it alongside Windows Defender in years prior) and I'd certainly say I like the software.
Frankly, the main reason I use default-deny software is because I'm uncomfortable with the way antiviruses allow files to run unmitigated. Don't get me wrong, I'm confident in my own computing habits to not accidentally infect my own system, and due to me having a genuine interest in my own cybersecurity I'm undoubtedly at very little risk of infection because of that, but I'm not confident in a traditional antivirus's post-infection defences to protect me if that confidence were to be proven false, or if my system was attacked via a vector outside of my control (compromised website/CDN/ad network, for example.).
As for the reasons I use VS specifically: Firstly, its impact on system performance is hardly noticeable. After spending the majority of 2019 using Windows Defender and then disabling it at the beginning of this year, I saw an immediate and noticeable improvement to my system's performance. As everyone's hardware/software is different obviously results may vary, but my system is a cheap (£400/$482), general purpose machine running an i3 processor; it's not exactly a speed demon and any performance impact is fairly noticeable.
The second reason I use VS is due to its built-in Windows processes whitelist. This is what elevates it above SecureAPlus (the only other default-deny software I have any real experience with) for me. This might seem trivial at first, but if you've used SAP for any length of time you've probably been forced to unblock at least a couple of executables and dlls that are apart of any Windows installation but aren't signed by Microsoft. This thoroughly annoys me as I don't have extensive knowledge of every single unsigned file that's part of a typical Windows installation, and being prompted about said files simply generates doubt in my mind as to whether they're legitimate or not.
In regards of pricing: If you believe the pro version to be too expensive then stick to the free version.
As for controversies, I won't comment but I'll say this: If you don't trust a product (or its developer), don't use it.
Hope someone found this write-up useful. Thoughts? Questions?