I brought my first home a month ago and have lots of DIY projects lined up. Painting is the first step and I've done about 1/5 of it... but just realized now that all the paint I purchased from HomeDepot may give me lots of headaches. :p
I've heard lots of bad about The Behr paint too. It seems to be holding up on my house exterior but it's only been 2 years. As far as interior goes it's safe from the elements so I don't imagine it makes much difference. Since you've got it bought, the only thing to do is put it on and see if you like it.