I worked at care about 2 years ago for about a year. This is what I will say, my checks never came late and they always cleared. Can't say the same about other places that I worked. It's a good place to get you foot in the door. If you come to work on time and run your calls it's not bad. If you come to work and act like a kid you will be treated like one. Yes there is a clique, but if you don't let it affect you it won't.
Just remember this, you are the lowest level on the totem poll and there are a thousand new emts a year and that's how they look at you.
Have fun!