I actually used my custom made shade two or three times before I realized it was WAY more effort than I ever wanted to do when I parked the car. What happens is this: you park for, say, 10 minutes and think "Do I want to spend two minutes putting the shade up, a minute taking it down and putting it away, when I'm only going to be away for that short a period of time?" So you skip it that one time. And the next time you are gone for only 15 minutes...
Soon you just can't bring yourself to using it unless you are REALLY going to be away from the vehicle, for hours at a time. In those cases (like for those of you who are unfortunate enough to have to work for a living :>) then I'd go ahead and get whatever is the best for you, knowing that even spending five minutes putting it up and taking it down will only be done once a day. For those of us who don't have our vehicles unattended that long (or who make lots of short trips) I really think the absolute easiest thing is what you want because then you WILL do it (and I use the Wal-mart shades even if I'm out of the car for less than 10 minutes, because it takes less than a minute TOTAL for up and down).
Women are a whole different thing, as we all know. And as soon as someone figures them out, I'll buy their book <g>.
I have to disagree totally if you are talking about the ultimate Intro-tech fold up sunscreen as I have used the ultimate for nearly 1 1/2 years. I just went out and timed putting it up and taking it down. It takes less than 15 seconds to reach in the back and put the sunscreen up and less than 10 seconds to take it down. Even doubling the time should one mix up the top and bottom and have to refold and reverse when putting up is a fraction of 2 minutes.
RockwallRick, the ultimate does fit virtually all the windshield area except around the mirror. As far as ease of use, one has to "learn" the best technique for putting it up and taking down. I've found that laying it folded on the dash, unfolding, sliding it forward to base of windshield, lifting into place, and then snapping / securing behind the headliner is rather easy. Taking it down requires popping it out from under the headliner with right hand under the sunscreen in the middle holding it up, let it start to fold in the middle, and then complete the fold up on one side then the other (it naturally falls into place with virtually no effort). Once mastered, taking it down is simple and quicker than putting it up. IMO, storing is not much different than a roll-up one.
Also, my wife uses it all the time as she drives the car more than I do. It's the best sunscreen we've ever owned as we've used roll up and the snap fold up sunscreens on other vehicles. We use it virtually every time we are out and about from 10 minutes to hours at a time.