It seems like ever since I got my first A, every time I post my pre-II R's. I get something along the line of "At least you have xx's A and xx's interviews", because I keep my SDN account public and people can easily access my post history.
This is not just addressed to you but to whomever reading this: Please be proud of your own achievement! Comparison is the thief of joy. Congratulations on your 3 interviews before the new year! I think the numbers are in your favor!
On the other hand, I think it's important to mention that everyone's situation is different and people have different priorities. I do not mean that I am not grateful for my A's in any way, but as I've mentioned in my other comment, I am married, and my entire support system is based in MA, so to me personally UMass would have been a better choice.
Best wishes for your app cycle and I hope you get the II from UMass. 🙂