Once installed, VSIDO will remain stable ... the risks come in when doing apt-get dist-upgrades as SID changes daily. There are built in tools that will help report issues with packages and bug reports and the most important thing you can do is observe any of these and listen... when in doubt, come back here and we can discuss any of them
I do an apt-get dist-upgrade daily and try to keep up with the absolute latest that SID offers.. we all have a great many tales of success after success... In the event of something that we see is broken or borked, we will also report here on the forum and advise on what should be done...
Your first dist-upgrade will be a big one and it is usually not that way.. I apologize for this.. I have had to cease any development on the ISO's and have not released a new one in a while due to an issue with the 4.5 kernel not allowing a live-cd to boot. I anticipate it will be resolved with the 4.6 kernel release and new ISO's will return to being released every two weeks
So settle in, have fun, break VSIDO if you can ... as you see, it does not take long at all to install it... so break it and reinstall.. a great way to learn in itself