AP Calc AB on Flvs

My school offers only one class for AP calc that sadly intersects with my APUSH class, so I had to chose between both classes so I choose APUSH. Now I am considering taking AP Calculus AB online. I am strong at math and have past experience with flvs because I took Pre calc and Geometry on it and got an A in both. Can anyone tell me there opinion on the class in general and how hard it is. Also if you took it oine please tell me what did you think.