Watch TMP from the perspective of someone who had never really seen any of the episodes and you'll see how I came at it.
That was me, but I loved every second of TMP. Most of my ST knowledge, prior to TMP, came from a week of newspaper articles about the making of the film, and random b/w episodes of TAS.
I didn't even think about how long the tour-of-the-refitted-Enterprise was till I had to start defending the film to certain angry diehard TOS fans!