For full disclosure, I designed the CMP bench, and my son's company manufactures it.
I have been shooting P dogs for over 30 years, and have used some unknown benches, both of the Caldwells, the Jordan and the CMP. Being an engineer, I felt I could design a bench that would address the issues which arose when I was shooting prairie dogs.
I was concerned with smoothness of rotation, stability, top shape and rigidity, seating position, and portability.
Smoothness:
When rotating to a target, the table should swing smoothly with no chatter. When making small angle adjustments there should be no overshoot, or stick-slip to contend with. This was addressed with a machined bronze bearing running against a machined steel collar on the main tube. The table will rotate, chatter free, with or without the shooter's weight in place, and small adjustments are easy.
Stability:
The upper and lower main tubes are a close fit with each other, and the square tubes of the legs and seat support are aligned and secured with hitch pins. The legs are adjustable in length for uneven ground, and I do what "dsandfort" does, use a rock or a short piece of 2x4 under a leg for steeper slopes.
Top:
The top is made from CNC routed 3/4 " thick 13 ply Baltic Birch plywood. This is much more rigid than normal plywood, and allows a lighter weight, very stiff tabletop. The shape is unique, as the two front corners and the offhand elbow corner are removed. This is to minimize the "sail effect" of the wind on the top, yet leaves plenty of room for the essentials.
The top is 42" long, and about 45-46" long along the gun axis, with plenty of room for a front rest and a rear bag of your choosing. There is room for your binoculars, wind meter, rangefinder, iPhone or tablet and your ammo. Also room to rest your elbows when using the binocs.
The metal support for the top which is welded to the main tube is 10"x12". The top is secured to this plate with 4 carriage bolts and wingnuts. This plate is sized and shaped to provide maximum support to the plywood, insuring a rigid top when you lean on it.
You can look at the top here, click on the pics for a larger view.
https://custommetalprod.com/shootin.../product/326-precision-varmint-shooting-bench
Note the seat is not padded, you can do that yourself. I used some vinyl and dense foam, and stapled it around the bottom of the seat.
Seating position:
The seat is adjustable 4 1/2" vertically, and 3" horizontally, and the seating position is close to the center of rotation. Your feet are on the legs or on the ground near the center of rotation. The top has a semicircle cutout which you can lean against when seated. This takes your weight, and allows you to concentrate on the sight picture and trigger pull. There is generous room for the right and left elbows, and the top can be flipped over for left handers.
Having a short seat support keeps you at the center of rotation for stability and tracking, and there is no danger when leaning backwards.
You can see the seating position in the pics from an earlier post of mine:
http://forum.accurateshooter.com/th...og-hunt-with-new-rifle-and-new-bench.3903853/
Portability:
The unit breaks down into the top, top maintube, lower main tube with leg sockets, 3 legs, the seat and seat support. All the parts are secured with hitch pins , except the top which used carriage bolts and locknuts. This allows you to put pieces where needed when packing your vehicle on a hunt.
At the shooting location, it sets up and tears down quickly. If you have a pickup truck, you can simply lift the top and upper main tube off the bottom assembly, and put the two pieces in the bed.
You wanted pros and cons, and I stuck to a description of the pros of the CMP bench. I do not believe (being related to the manufacturer), that it is appropriate for me to make any comparisons or negative comments related to the other benches.
I hope this helps with your decision, and I hope you really have a great hunt.