The deal is simply paying more during the year, which reduces the amount of principal and thus interest compounded, which really helps on 30 year mortgages. You wind up making the equivalent of 13 monthly payments in a year.
Just math. I don't do it, have a 15 year fixed anyways.
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Blistex, in regards to crappy games -
They made pong look like a story driven RPG with a dynamic campaign.
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