Yes, I successfully used one at the beginning of this month. I've been feeding foxes in my back garden for a few years but both my wife and I recently saw a badger on separate occasions. This is quite remarkable considering we are in the suburbs well away from the countryside. The animal has taken over a disused foxes den close to the foot of my garden, from where it has access to a large grass area for earthworms in the grounds of a clubhouse.
So one of my sons borrowed a track cam from a wildlife trust volunteer he knows, and I fastened this to a clothes post with thick-rubber coated garden tying wire. The camera contains a large number, I can't remember now how many, of rechargeable AA batteries and it was just a matter of switching it on. You have to open the front of the cam for the switch, and I had been warned not to open the front too far because the wires go through the hinge. The cam came with a dual-purpose usb cable for charging and for connecting to a pc, but when I was ready I just pulled the sd card out and put it in my laptop. Similar cams are around £40+ on Amazon.
In just one night it recorded 104 video clips, starting with a squirrel at dusk and ending with a cat in the morning. Apart from an old man shuffling past and scattering dry dog food, cough, cough, the rest were mostly foxes but also the badger. The foxes were around from dusk tilll 20:00, the badger from 12:00 to 01:00, and then the foxes were back from 05:00 till 08:00.
The video clips are very short, b&w of course, with the time and date displayed, and they are in .avi format. Some of the people I sent them to couldn't play them on their phones, so I used online converters to change them to .mp4 and compress them.
It was a fun experiment but you will note that I only used it for one night, I saw all I wanted to in those 104 clips. I really think the novelty wouldn't take long to wear off, and for that reason I won't buy one.