Thank you for all your inputs, quite some interesting views here. My question was really aimed at a scenario where there is good situational awareness and a very obvious problem (e.g. a single ASI jumps to 0). Of course if there is confusion or an upset situation these memory item values could save your day and should be applied if ever in doubt. Pitching up though in tight RVSM airspace when there is no need gives me a headache...