Bad.... Hear a review from a highly experienced player.
To start game play, the game play of this game is terrible, its all the same, all you do is click and wait for your character to do something, click watch your character cut a tree, click watch your character kill a monster with a terrible combat system, click watch your character cook a fish, you get my point? Thats all your ever gonna find yourself doing, it takes no skill, no technique, nothing.
Moving on to getting items, did you ever see that guy walking around with that oh so cool piece of armor? Well in this game to get that it can take you HUNDREDS of hours, heres a example, Dragon Chain the oh so mighty cool piece of armor everyone wants, well too bad, your not getting it! Unless you wish to spend weeks to get it, even at level 112 and 85 slayer, you gotta spend a week minimum, if your lucky. At lower levels you can end up spending hours upon hours of boring labor just to get a lower level item like rune.
Customer support. You ever want to get a straight forward answer from the creaters? TOO BAD! Jagex almost never send you a answer, they hardly read your question, sometimes you can send them in something like is such and such considered breaking one of the rules, they say 'Read the rules' even if its not in it, their customer support is terrible. They go on out of control bannings, they ban you if you say a complitly legit, and save website, they even sometimes ban people for having a confusing name, how unfair is that, say you registered 4 years ago and chose a name like o0o spooky (example not a real name), they would ban you because since they don't wanna make o and 0 look different in-game, so they just ban hundreds of people instead.
Play if you want to waste time, if not avoid this game because you'll become addicted.