Thoughts: It's fairly light romantic entertainment of the glassy-eyed sort, and overlong at 110mins. The peripheral characters seem to exist only to serve a select few purposes, and the two leads have lifestyles and make choices that are fairly unbelievable. But still, it is Channing Tatum and Rachel McAdams, so you can kinda forgive the whole "unbelievable" aspect of it, because two people this beautiful wouldn't have anything but what they have. Regardless, it's basic romantic entertainment, nothing more, nothing less.
Paige (McAdams) and Leo (Tatum) are living it up all bohemian style: Paige is a not-really-struggling art student and Leo has a kinda-struggling recording studio. They get married and all that, but a car accident leaves Paige with a memory gap of about 5 years, including her life with Leo. Her uptight family decide to try and get their daughter back into the fold, and Leo has to contend with that, and with this lady who no longer recognizes him or their friends and current life together.
There are some questionable decisions and dialogue choices made throughout The Vow, and the last 20 minutes or so seemed borne of coincidence and lack the gut punch needed for one of these types of tear-jerkers. Regardless though, the chemistry between the two leads is enough to keep you fairly interested, even when the characters and their lifestyles don't make you invested.
I don't have much else to say, really. The direction is standard, cinematography same, script standard, etc etc. This ain't my kind of movie. But it affords me time spent with the wife, and if it means I get to add another film notch to the belt, then I'm all for it. Also, Rachel McAdams is very attractive. I love her smile and eyes, they always seem so radiant.