I like that expression! I will be using it in future!

AS for extras-devel. I have never had a problem with anything I got there but it is definitely worth searching here first to find some info on the app. Not all apps are finished, optified or optimised but if there is a thread discussing it you generally discover that it wont do any real harm to your device.

I agree the warnings are often exaggerated but as "someone said earlier" there are people here that will try an unfinished app have problems and bad mouth the developer and expect everyone to help immediately which is why the warnings are there.

Learn how to re-flash your phone and you are ready for nearly every serious problem you get. It also gives you the opportunity to try things to learn the phone and OS because, if all else fails, a reflash will fix 99% of problems.