What is the best car desk rig on the market? 

Try jeniko.com. Well built, well priced.

JWG

The Jotto deck tops are great. Many police departments use them. They are made here in Arkansas, so they have to be of good quality. You can't go wrong with them.

There you go, Chuck....now I just cant' help it.  I think Bob Harvey's 3-step ladder is better than your pipe & flange!!   Afterall, you can get extra use out of the ladder when you want to wash the top of the roof of your truck or van.  The trick with that little ladder is whether you can slide the passenger seat back far enough and get the laptop to sit just right.  Do you use that cutting board for slicing & dicing too?  

yep, it multi-tasks, but I don't use it in the vehicle. You can see my mobile desk here and I bought it from these folks http://mobiledesk.com/  but I do NOT recommend it.

The previous suggestions are more adjustable and cost less.  The ones from mobile desk.com just have a bent tube at the top, and you cannot configure it the same as the Jotto desk or Jenico.com.  I got mine to work OK but had to hacksaw to shorten the pipe and do some mods.

Tim, That looks fancy enough. Just remember, the longer the lower leg, the more wobble its going to create. Not good for the laptop. The jeniko I use was less that $100, and has very little wobble.
 

JWG

The base that mounts on the floor of that Ebay unit is not large enough - I assure you it is going to "flex" like crazy.

The one above has just one mount, to the seat bolt.  The "upgrade" one below has one extra stabilizer bolt, but that still isn't enough

The base on my mobile desk is huge compared to those, and I think it is barely adequate as it only mounts at one seat bolt but has 2 additional stabilizer points on a very thick plate of steel that is about 4" x 6".  It "works" but if I had it to do over I would get one of the other suggestions above.

If you look at the bases alone at Jotto they will cost as much as the Ebay unit, but at least it would function.

I have a multi-jointed mount that my loving wife bought for me from Delorme.

It has a large plate with many holes in it at the base and I have bolted it to the floor at the tunnel on my Dodge.  Very stable.

As the saying goes,.............screw it.

Looks like Delorme is selling the Jotto Desk and that is a good price they have. I like the base plate, and after installing 2 of the "no-holes" type that don't screw to the floor, I agree with the "screw-it" method.

That's what I did for my other vehicle (Tahoe) and you just have to get over putting holes in the carpet. The next buyer likely won't even look that close to find them.

The "screw it" system seems OK, I guess.  But I never used/needed the laptop while driving, so it's always just taking a little nap in a comfy place.  The port-a-desk can  be a convenience, I suppose .   My "finder" is me & mapped out in my mind or on a mapquest printout before starting the day.   A comfy positioned laptop to do your estimates is the most important thing while sitting under the shade tree, anything beyond that though I think you can go with economy.  Then again, I am a mini-multi-tasker, like to keep at least 1 eye on the road.

I agree with the "one eye on the road".

That's why I have tri-focals.

Multi-tasking at its finest.

Down-sized from laptop and DeLorme to 4'' screen MAgellan mounted to the windshield!

I agree. The Jotto desk is the way to go, Why take a chance with damaging a $1,200.00 to $2,000.00 lap top with a cheap rig, just doesn't make sense.

http://www.a2zsolutions.com/

This website has all kinds of desks and stuff and gadgets and stuff and other goodies and ........................