I love the website, I have bcome a good writer (I write a FanFic series on HEX) I have made so many friends and you can actually live the Harry Potter experience! If you haven't found your life on there, keep looking - you will find it.
BUT, I think some of the mods are very unfair. No kidding. I was doing nothing, and sent to Azkaban for posting in all caps....like, seriously!?
Also, there can be some really rude users on there. I know that happens on every website, but is it normal that almost every day you log in, you have to keep thinking, "it isn't real. It isn't real. It's just a website." and then they tell you to not take it personally?! Nuh-uh!
And the ignoring? Horrible. You post somewhere, you are ignored. Unless the thread includes your hogfriends (hogwarts friends) you have a big chance of people just ignoring you and it makes you want to just crumble to the floor or log out and do something else.
Other than that it's a really good website. Best Harry Potter website there is. Pottermore used to be cool, but now HEX is loads better. I definitely suggest joining but be careful who you make friends with - it might not end good.