If you're reading this you probably know that Deathproof was originally released as part of Grindhouse, which pays homage to some of the less well made cultish films of yesteryear. Deathproof was made and cut into a much shorter version, to be released with the other feature "Planet Terror" as part of one film eancapsulating the "Grindhouse experience". This however is substantially longer, and was filmed and written as a full length feature. This means that the film isn't longer because they put all the crap they cut out back in, more that the Grindhouse version had to cut lots of things out.
Now if you complain about this film having too much dialogue, then you can't have seen many Tarantino films before. His films are all about the dialogue! Tarantino dialogue doesn't appeal to everyone, even I cringe on occasion, but his dialogue and storytelling style is largely about people being cool rather than being entirely beleivable. It's all about colourfull characters, in unusual situations.
Now the film isn't perfect and i'm not going to stick up for it's flaws. Clearly the action scenes are what makes this film memorable, particularly as the Kiwi actress Zoe Bell (playing a character called Zoe who is a Kiwi) actually did those stunts for real, no harnesses etc.
Just because there isn't action all the way through doesn't matter. You wouldn't say jaws was a bad film just because the shark wasn't there the whole time. When stuntman Mike appears, things happen.
This film is great, but I admit not Tarantinos best. However, I really enjoyed it. Turn your mind off, watch the girls in skimpy clothes deliver dry witty diaglogue, then squirm in your seat as the inevitable happens and cheer at the end.