lavafish

Congrats @lavafish! I totally agree with you, after more thought my decision goes down to Stanford/MIT. Columbia initially appeals to me due to the opportunity to network in NYC and the program length, but I also have the impression that they have a large cohort and I would very much prefer a smaller, tight-knit cohort. Their curriculum (in terms of length and mix of classes) is comparable to Stanford, so I'd choose Stanford over Columbia. 
MIT Sloan's resource for professional development seems outstanding to me (they have perfect placement rate). Another great plus in addition to the two you highlighted is the opportunity to conduct research assistantship with MIT professors. It seems like the MBAn program has great career pipeline if you want to do data science in consulting/finance (in addition to other industries - these two stood out to me, just like how Stanford's connection to Silicon Valley tech stood out to me). 
I do prefer Stanford's curriculum in that students get to take more (in terms of units, but also variety) classes focusing on various topics in ML and computing. It is pretty crazy that you can take classes with, and possibly do research with, some of the most influential names in ML (e.g. Andrew Ng and Rob Tibshirani). Another big plus is the opportunity for full-time 3 month summer internship AND capstone project (if you choose to do one for the Practical Component). Also I think last year Stanford admitted ~20 students and MIT MBAn admitted ~50-60 students. 
Personally, I'd like to stay in California, hence Stanford ranks higher. 
These two/three programs are really, really good options to have and I hope we choose wisely : ) let me know what you decide on!

@diplodocus_ I have some similar admits! Also got into Stanford/MIT/Columbia, and rejected from Harvard (lol).
 
My impression is that Stanford's program is the most selective and probably the best for Silicon Valley tech. Personally, I'm also heavily considering MIT's MBAn because I prefer the east coast. I think the MBAn has a couple of other nice features that stand out, such as the 1) tight-knit cohort/sense of community and 2) great professional support. MIT's program also seems more applied than Stanford's program, if you have any preference on how theoretical v. applied the curriculum is. Another difference between these two schools that stands out is the length-- I do like that Stanford's program is a couple quarters longer and accommodates a summer internship.
Columbia is a great school for undergrad, but I have the impression that its Master's programs have very large cohorts, so there doesn't seem to be the same sense of community at the grad level. I also heard from a Columbia alum that the DSI classes are mostly night classes to help accommodate part-time students, if that affects your decision at all. On the other hand, if you want to be in NYC and develop a network there, Columbia should be fantastic for that.
Curious to hear your thoughts on Stanford/MIT/Columbia as well!

Hey all,
I got an admit from NU MSiA today. I'm v excited cause I only applied to NU and UChicago. Still waiting for UChicago Stats atm.
 

Not sure whether round 1 is over, but I received an acceptance from Northwestern's MSiA program. I applied by the early deadline (Dec 1) and received an interview invite in mid-late December though, so if you applied for the regular deadline I don't think this should be a reason to worry!