The few books I've dug into from them on python are good and recommended by the 6.00 series of MIT MOOC on python. Also, free book of theirs is offered everyday on their website. I'm not sure how long that is going to keep happening cause I can't imagine them having enough books to keep doing that with forever.

I think you misunderestimate the spam cannon that is Packt Publishing. They'll publish pretty much anything, and seek out authors that don't necessarily know anything about the topic. They've currently got enough titles to do a free book per day for something like 10 years, without taking into account new releases.

Some of their books in specific topic areas are actually good, but in general, beware.