I think a better use of your time than review would be to think about your study plan for later.
Read old posts in this forum and find out what books people used, what questions they used, and how long they needed to prepare. Read amazon.com reviews and anything else you can find to get more perspective about what books are worth buying and what books to ignore.
Get a book for one subject you've done already and flip through it to get a feel for the amount of content and how closely it matched your 1st year course. The purpose is not to review but to get an idea of how much time it might take you to get through a book like that. You can then compare this with other reports on this forum to figure out if you're faster, slower, or about the same as others. Think about how you could put together a system that would help you retain that information.
Think about your 2nd year schedule and figure out how much time you can spare during spring (and perhaps winter) for prep and how much time you have available between 2nd and 3rd year.
These are things I did during my post-MS1 summer. You have to do them sooner or later, and it's much less painful than actual review. If you review now, you'll just have to re-review later, but if you make a tentative plan now, you'll save that much time down the road.