Yeah, the acting is a bit wooden, and frankly the special effects are pathetic.I like the overture. It's a disciplined but exuberant attempt to concisely summarize the music and wake up the sleepers.
You should really go to an opera house if you want to get the real thing. They basically just tape what you'd see if you went to the theatre, so no mikes, no special effects, it's not meant to be a film!Anyway, it's more about the art of singing, projecting your voice etc. than being able to hear the words, although people who hear opera often (live) probably get to understand what they´re saying easier.