Never ever cancel the restriction even if cleared above the restriction unless it is clearly said,such as "climb unrestricted","open climb",in the UK "climb NOW",
If not sure ,ASK!
If you are from Singapore,Singapore airport does have SIDs with level restriction and those have to be respected...unless you are a mainlander and used to cancel all the restrictions systematically and ends up in high speed steep descent when reminded of the level restriction or simply ends up in a level bust.
