New
#11
Its not intrusive either.
By default its @ 3am I think, and thats just once a month -- unless something critical can not wait & absolutely needs immediate attention.
This is why I just leave mine on Auto for Important only. Everything deemed critical is automatically installed when released.
Then I look through Recommended and optional and install the ones I want/need. (Although I usually just install everything)
I agree with everyone else as well. Unless the machine is never online, Always let Windows update.
The amount of space the updates take is minimal.