I've had this game for almost 10 years now (bought it when it came out). I've played it hundreds of times. I have both the physical game and the online version. I also read 5 or so of Kiyosaki's books and was a devout follower of his financial advice for several years.
What I like about this game is that it helps you to think "outside the box" in terms of investing and leveraging your energy. As a direct result of playing this game so much, I created an online business that is mostly passive and nets me $1,500 per month (I only need a few more deals and I'm out of the rat race!). From that perspective, it is well worth the $300 I paid for it years ago.
What I don't like about this game is that many of it's "opportunities" are get-rich-quick ideas that are so risky that anyone who can appropriately evaluate risk would run fast in the other direction! As a result of this "get-rich-quick" philosophy (that I bought into when I first began playing the game) I lost a year of my life and thousands of dollars to a bad business deal.
I also don't like that he's such a huge advocate for getting into debt (he would call it "leveraging your money"). This game highly rewards you for borrowing lots of money and offers an unrealistically low amount of penalties for taking those risks.
Basically, if you use ALL the same strategies in life as you do to win this game, you'll end up broke, in debt and possibly bankrupt. However, if you take the good and leave the bad, there are quite a few financial gems you can glean from this game.
I still play the game occasionally, but I now have a different real-life philosophy of debt (the borrow is servant to the lender). By the way, I highly recommend Dave Ramsey's financial material. He offers a much more sound "fail proof" system for building wealth.
I would only recommend this game to a friend if they had a solid foundation of how to handle money responsibly and I knew they wouldn't be lead astray by the faulty reward system promoted in this game.