Some of them are good and some of them are terrible. A lot of them are really smart and know the subject but are not good teachers. A lot of them also have foreign accents which sometimes makes it hard to understand them. Most of them, even if they can't teach, they're nice people and if you get on their good side, they can help you out on your final grade. They all also have office hours at some point during the week so you can reach them, but I'm sure their availability varies.
Most of my professors are really cool guys actually. There are a handful that are a pain to deal with, as expected, but for the most part I've had really good experiences with the professors that I've ended up with. Most are understanding and willing to work with you on almost anything.
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