They are less expensive then duke. Is there any problems with them

Not really a problem but for me the eyes are smaller so they tend to get hung up on the rivet when setting and I've had the triggers be extra sensitive this year for some reason.
Others on here gave me a couple of suggestions on how to mitigate the trigger issue but the majority of them is to buy replacement triggers.

I second the eyes being too small. Also the bars them selves are a smaller diameter and seem to be prone to bending more than the dukes. Personally I use mostly duke 155s for that sized trap applications . I’ve taken lots of ‘rats mink and even a few otter in them .

The small eyes have a lot of hate. They are a pain to deal with sometimes, and if you use setters instead of setting with your hands those eyes are too small for some setters unless you modify them. I've got a couple dozen, other than the eyes they work fine and are super powerful.

I've not had any issue with the triggers being sensitive unless you wax them, in fact I've rubbed a little wax on them before to make them more sensitive to catch weasels that are stealing my marten bait at times. Not an issue, but you can't set them on the tightest notch in the dog, I'm assuming it is the same dog used on other traps is why it has that notch, but there is no way to compress the trap far enough to set it on that notch.