Yes, Warren has done very well.
We get a feeling, if we can, about what we think the company is worth.
We may buy a little bit of a stock, to get our feet wet and get a feeling for it.
Ben's emphasis was on protecting his expectation of profit with minimum risk.
We like to buy stocks which we feel are undervalued and then we have to have the guts to buy more when they go down.
When it comes to investing, my suggestion is to first understand your strengths and weaknesses, and then devise a simple strategy so that you can sleep at night!