Here is a picture of how I have it set up. Like I mentioned before the suction cup works great. All you have to do is loop the bendable arm under the camera and let part of it brace itself against your dash and you're good to go.
I've had other mounts and this is by far the easiest to quickly adjust if you want to move side to side or up and down to get a tornado in the shot.
Do whatever you want. I don't really care, but you can go down to the store, take it out of the package and see for yourself what your getting. Yeah it is cheap, but I've owned some of the most expensive windshield mounts there are. I want my camera mounted in the corner of my windshield and the more expensive ones block more of your view and are harder to adjust. Here is a picture of how mine is set up in the car.
http://www.loadedgunchasing.com/images/DSC00297.JPG
No it probably isn't going to work as a side window mount for a SLR Dustin. They aren't exactly the lightest cameras and it's not going to hold the weight with the arm stretched out like that. If I tried to park my D70 on that it probably wouldn't hold steady at all if I were driving.
I prefer having a corner mount on the windshield since I'm already tight on windshield space. I don't want a camera in the middle of my windshield blocking my view. I already have a stormhawk (PDA with GPS unit sticking out the top) in the middle of the windshield, a laptop right in front of me blocking the bottom portion and the bottom right corner is blocked with my video camera for streaming. I looked at similiar products to what Dustin posted a link to, but like I said I want my camera for streaming out of the way and I want one that is quick and easy to adjust in any direction. I ride shotgun while my chase partner drives, so my perspective inside the car is going to be different then somebody who is chasing solo or driving. If you are going to be driving then blocking a portion of the windshield may not be a big deal to you and would make the camer more accessible. It all depends on the application.
For and quick easily adjustable mount in the corner like I show in the picture it works fine. If you want something that is going to go square in the middle of the windshield and hold steady while you fly down diirt roads then don't get it.