They're the best. But if you're set on spending the money, you can get them at Ford for roughly $10 or $3 at Walmart without the markup.
Autozone carries them as well for a slightly higher price, including Motorcraft oil which I run. Autozone has a rewards card, you get a point for every $20 spent and that all adds up when you work on your car. I buy the oil by the case and occasionally get free oil every few changes.
Motorcraft is an excellent quality filter. Wally World sells them for much less than the Ford dealer can buy them from Ford. I hate supporting WalMart for anything, but you can't beat the price anywhere else.