Amusingly, the introduction to "Seven Habits" starts off arguing against a hollow "personality ethic" approach pushed by other self-help books. I could be misinterpreting, but I believe that this is Covey insulting "How to Win Friends."
I found both books full of obvious things, but also found that reading and reflecting on obvious things can still go a long way for self-improvement. Personally, I didn't like "7 Habits" though because Covey is always saying his methods/truths are "self-evident" and he uses the "this is true because it would be dumb to think otherwise" line of reasoning at the points in the book when I thought his argument was weakest.
I found both books full of obvious things, but also found that reading and reflecting on obvious things can still go a long way for self-improvement. Personally, I didn't like "7 Habits" though because Covey is always saying his methods/truths are "self-evident" and he uses the "this is true because it would be dumb to think otherwise" line of reasoning at the points in the book when I thought his argument was weakest.