is screwing your customers, then ok. Personally I prefer companies that make lots of great products and sell them for barely any profit so I get to have great stuff for less. A company with huge profit margins is a company that is charging more than they have to.
If you are an investor, liking a company to make a high profit margin makes sense, though I still have to question it in the case of Apple since they hoard the cash rather than pay it out as a dividend. However if as a consumer you applaud high profit margin you are silly.