For out of the box simplicity, my 5450 was pretty darn easy. I have had no problem connecting to my office or home WiFi networks (haven't tried to connect at Starbucks yet).
But the WiFi does eat up battery power. Unfortunatly, even though the 5450 has a removable battery, HP has not made either the standard nor the high capacity battery available yet (I have filed a formal complaint with HP on this one).
As a result, I am stuck with limiting my WiFi experience to a few minutes here and there, unless I want to stay plugged in to an AC adapter all day.
Until HP makes spare batteries available, I would look elsewhere.