It is a great place to go for general Kindle discussion. The people are very friendly and helpful and informative. But there are very strict rules on discussing anything that violates Amazon's Terms of Service or that could be illegal. So you will not find much discussion of removing DRM, pros and cons, or rooting devices, or hacking devices, or anything along those lines. And no swearing or anything not family friendly.
I post there frequently. There are a lot of positives but they are very clear about what you can and cannot discuss.
Awesome discussion of all things accessories. If you are looking for a cover, purse, bag, screen protector, or the like you will find it there. The major brands all post there frequently with product updates and the like. There is a decent amount of member cross over.