I've experimented with WindowsFX 11, and it does a commendable job of emulating the Windows 11 aesthetic while maintaining the core advantages of Linux, like stability and security. Regarding compatibility with Windows applications, it comes pre-installed with Wine, which allows many native Windows programs to run fairly well. However, not every application will work perfectly, and some might require additional tweaking or may not be supported at all.
Performance-wise, it's generally smoother and faster than running an actual Windows system on older hardware due to its lighter resource demands. It makes a good alternative for those who prefer the Windows peek but want the open-source benefits of Linux. Just keep in mind the potential need for troubleshooting when dealing with specific software compatibility issues.