Pros
Management isn't all over the place, and thus, you will have a good idea of what they are looking for via a complete job description. They've been around for awhile, so you aren't getting yourself into some upstart ponzy scheme that benefits only the person at the top. Good college job part-time job.
Cons
The fact that you are parking cars for a living doesn't really provide job satisfaction. So if you are in college, cool, but if you're in your late 20's-early 30's...don't fool yourself, this will not supplement your desire for a "career." The pay starts out okay, but will not improve. Unless of course, you actually get the one promotion you can possibly get, and even still, your pay rate only goes up $1/hr. Running around in the ice and snow and rain is always delightful.