All I've dealt with are the ones that use the magnetic strip badges. The software was kind of crappy, but not too bad, it did what it had to do.
The badges did die quite often, especially if kept in somebodies wallet. Or kept on their tool box where it kept getting beaten up.
Down side is that somebody can punch somebody else in. Then again that was an upside when I was just supervising and didn't have access to
the software, if I needed to call somebody in, I'd tell them "I'm punching you in now, get your ass here". Or when you had a guy that had
a criminal summons to go to court because the compressor at the shop was too loud.
Upside to the badge thing, you can double it up and use it to track your guys time, you've got 3 guys and 50 badges.... Nice on a time and
material job, you get a nice print out to show the customer
Probably something that none of you have ever thought about, the time clock is a nice little box, with a battery back up. It can be moved really easy.
First guy in and last guy out, can take it home, take a shower, drink a few beers, and punch out, then get up in the morning, punch in, eat breakfast and
head back to the shop, hang it back on the wall, and plug it back in.