I really enjoyed the 1st episode. I remember not liking the previews very much but the actual show was pretty entertaining.
Sure the main characters, the main kid who is just a combo of Luke and Han, and the dull jedi are not that great but the supporting characters are very good. Filoni and his team really know how to tell a good Star Wars story and all the design work and music is impressive. It was just a lot of fun.
i honestly wished they had given Filoni the directors chair on episode 7 and I thought that as far back as the Clone Wars cancellation. I have a feeling this Rebels show will be the one everyone enjoys with the upcoming movie causing the usual anger and disappointment.