> if you “win” a negotiation through power then you will likely find later you lost when you get paid back for winning through strength.

Could you please provide an example of said scenario?

> if either party feels that someone won and someone lost, then that will be a bad start to the relationship. Negotiating salary is about finding a salary that both employer and employee feel happy at.

Yes, I second this. It once happened to me that I "won" by getting an over-budgeted salary, but had to quit 3 days later because one of the bosses leaked in a meeting that they intended to overwork me since they felt hustled by me during the salary negotiation.

Said and done, they assigned me more work than initially scoped, as to adjust the "bang for the buck" balance (and had to quit shortly after that).