I never noticed any bad effects until Jedi, but then I was a bit older and was able to understand some of the effects better. The speeder bike chase was fun but looked "phoney-boloney" as I was fond of calling things. I did notice the rancor but the shot was so short, I just noticed it looked funny. I also noticed the some of the TIE fighters were poorly layered in the last space battle. It wasn't until the 86 video release that I started noticing the flaws. I can live with most of them. I just get bugged with Lucas claiming they fixed them in the Special Edition, when they did no such thing.