Caught a couple problem groundhogs with this trap. It is very easy to set and release. No little parts to mess with, just slide the handle back and off they go.
I've had it for 30 days now and I've caught 1 Fox, 1 Oppossum, 1 Blue Jay, 2 Racoons and 4 stray cats...the key is to cover the trap with weeds, grass, small limbs with lots of leaves, etc., especially the bottom of the cage so it feels like they are walking on grass once they get in it...a smart fox doesn't like walking on wire and can easily spot a trap if not camo'd correctly. Then, bait...any meet, but especially fishy smelling bait. I put my trap behind my chicken coop so I can catch anything that might otherwise try to get my chickens...it's a lot easier for a fox to eat the tuna in the trap than to try and dig under the walls of the coop, so it's worked so far. Also, be sure to put the bait in the very back corners so they have to walk back there and it trips the trigger. Very easy to set, but depending on where exactly you put the "little hook wire" that holds the cage door up when set. Slide it back to where it barely seems to hold it up and it'll be a hair trigger - that's the only way to be sure you get everything that comes in...I even caught a Blue Jay I set my so lightly triggered.