The first really annoying scene was at the restaurant that wouldn't sell a slice of Key lime pie unless the customer orders and eats 3 dozen oysters, which appears to be all it sells. It employs a waitress who brings 2 bottles of beer to customers who ordered a Chardonnay and a water, then drops off a check without apologizing. That's not charming and a restaurant like that would likely (and should) go out of business. That said, it does set up a nice moment later on.
The movie also goes a little overboard in making Erin Krakow's Elizabeth and Giles Patton's George seem like fun hating nerd robots. George is basically a caricature and the scene where Lizzie places a complicated ice cream order (presumably meant as an homage to Meg Ryan in When Harry Met Sally) was not endearing (although she was thoughtful enough to hand the worker a written list).
Tyler Hynes' David comes across as a pleasant free spirited guy at first, but he orders ice cream without having any money and then selfishly and thoughtlessly plays bad, really loud rock music in the kitchen at 2am which wakes up Lizzie (and presumably everyone else). He then interferes with Lizzie's wedding appointments after promising not to.
But, eventually, the movie settles into a more enjoyable groove (love the use of "How Will I live"). And every artist on the planet will have artist studio envy once they see the location of Louise's studio. The house is also quite lovely and the cool treehouse is worth a star just by itself.
I enjoyed the gradual awakening by Lizzie and her growing affection for David. I just wish he was a cousin instead of George's brother, although that was handled gracefully at the end.
It's probably a 6 star movie but that treehouse was really cool.