I'm a Sinai MS-2 so my opinions might be biased, but I wanted to put in my $0.02 about this.
When I applied to med school, I didn't even consider Vandy because it's a deal-breaker for me to not be in a large metropolitan area (same rationale why I didn't apply to WashU or Duke). If the city is important to you (or you're from a more rural hometown/college), I recommend you to come to the Sinai revisit since there'll be some partying in the city (if the bar night is held at the same venue as last year - an open roof terrace midtown - you'll love it). It'll give you a nice perspective of what it's like to live in the city (and trust me, given Sinai's chill atmosphere and approach to classes, you'll be doing a fair amount of "exploring" in the city the first two years 😛 especially the first).
Other that, I think the revisit is also just a better venue to get to meet more MS-1s and hear about their experience if you're seriously thinking about attending. I think from my interaction with applicants last year that a lot of people changed their minds at Second Look, which means we're definitely doing something right for our programming and getting applicants to meet the current students.
And for the people talking about the relative positioning of Sinai and Cornell and other NYC schools...I don't mean to be rude but puh-leese. This is New York City!! We can be Midtown in less than 10 minutes at night in a cab, or all the way at the tip of Manhattan in around 30 minutes on the subway at all hours of the night or day. In fact, many people working in Midtown end up living around 96th St. or even East Harlem proper (which is much more "sketch" than the area around Sinai) just to save on rent. There's a plethora of eateries, 24-hour supermarkets, and CVS (lol) anywhere you look. If you're comparing Einstein or Columbia against Cornell/Sinai/NYU, that's fine, but now actually having lived in NYC for 2 years I feel like as long as you're not too far north on Manhattan (south of Columbia undergrad on the West side, south of Sinai on the East side), it's all about the same. Also, I don't mean to harp on the location but one huge draw we have (and my friends at Cornell and NYU envy) is our proximity to Central Park. It's amazing to be able to take a nap on the East Meadow during your lunch break when the weather's nice out in the summer and the fall, and head back to class when it's around :55.
So think about it. I doubt the Sinai second look will tell you more about the curriculum/grading/research than what they have already told you, but come if you want to experience what it's like to be a first year here (I think they do a good job with that at Second Look) and also I hear Dr. Laitman is the featured speaker this year, so you might not want to miss that 😉 (wikipedia him - you'll have more than enough of him as a first year here for Anatomy, but he's an amazing anatomy instructor/speaker, and well deserved).
