The upsides:
- You don't have to pay a 3% loan origination fee - Ouch.
- A lower interest rate - in my case I'm saving 3.25%
- Home equity loans less than $100K are tax deductible - Sweet.
The downsides:
- Reduces available equity in your home
- No grace period before you being paying back the loan (although you might be able to get away with paying only the interest while in school)
- Interest is not fixed - Read: it may go higher than the rate of the PLUS loan