Replying to Online schools vs in class

Just curious what you guys have experienced in terms of online school vs. In class degrees. Id be going to schools part time so one or 2 classes at a time. If online is it a bitch transfering credits and are most schools accepting or will i get fucked out of credits i have? If online what schools are good for transfering? Or is in class even if its just pre-reqs. Is it worth taking only one class? Just curious on how it all works.