What's yur opinion for advantages and disadvantages.
Likes & dislikes.
Reasons for one or the other (excluding already have, no reason to switch)

I spent the majority of my trapping life with dogged traps but in recent years of using dogless traps I can see myself moving more that way as I need more traps or need to replace traps. Until the advent of the heavier dogs like you see on MB 550s or the Duke 650s, we stiffened our dogs with a backer piece. And only having an arc welder back then, I blew through a few dogs before I figured out how many amps were just right. With a mig it’s far easier. It’s still one of those tedious jobs I dislike.

I’ve modified several #3 DLS with dogless pans and really like how they come out. I end up with an adjustable tension pan that sits flat and level with or slightly below the jaws.

As to advantages one over the other I can’t really say other than the dogless traps have one less part for the coyotes to bend, spindle or mutilate. But I’ve caught some big piles of coyotes on dogged traps and just dealt with the occasional bent dog. How’s that for an ambiguous answer.

There’s a couple things I like better about the Montgomery style dogless design.

One, it’s dogless. Duh.

The second is with that design, the pan is able to sit quite a bit lower in relation to the jaw faces, much lower than a traditional dog-on design at least.

Bridger dogless design.

No negatives.

Adjustable nut/bolt design dogless pan.

Trap beds easily and stable...better than any trap I've used and I've used many brands and sizes.

Mongomery system, once adjusted they don't go out of adjustment unless damaged. No nuts or bolts to tighten or loosen. No dogs to get bent or introduce creep or varying pan position due to a loose dog eye. Pans don't get bent and beat up if you leave the stud and bolt on the pan.

Montgomery dogless style for me also

I’ve used the Montana #3 dbl coils and love they are dogless. In either offset or tight jawed, they were awesome. Arthritis is keeping me away from foot traps or I’d still be using them.

I rate the dogless # 2 SJ Montgomery with a modded lever and jaw width as tied with the dog on MB 550. The Mont. is everything Boone said plus it is lighter in weight, initially cheaper, slightly larger jaw spread area and sets easier. The MB has better cast jaws but is heavier and more expensive. Never had a coyote tear either pan apart or lose a dog from the frame. Out of the box the MB wins but the dog less Mont is as good as it gets when modded for me. Got some Mont SJ dogless in Sioux Falls the lot for 4.00 ea which makes the additions cheap enough when you can do the welding. Those wide cast jaws of the MB make it hard to beat, tougher and I don't see any more loss or foot damage on either one when compared in a (our) daily trap check law. Boils down too - How deep is your checkbook vs. how good of a welder are you? From this side of the fence. .............................the mike

dogless -ease of setting, less dead spot, less maintenance- just more advance trigger IMHO