I have heard great things and glowing reports about the game itself....the service not so much. I have a buddy on my friends list that loves the game but every day or two he'll have a comment up saying "Damn U DC!!!" or "Servers down again" so I know that it has different server issues that spring up now and again. Also from watching Xplay I saw that it apparently has a really low level cap for a MMMO. The dude said there's tons of other stuff to do but that he capped out in 4 days. Apparently that 15 a month is going to pay for different add-ons and quests that pop up so it will have a lot of replay value.
The real question is why on god's green earth do you have the Michael Jackson Experience on your Q? I'd say they did you a favor by sending a different game ;) But seriously they don't always send the game at the top of your Q. Many others and myself wish that were the case.
Because you want good games. If you had just settled for NBA Jam you'd already be wallowing in misery playing it right now. Honestly though this is how this service works. I mainly use it because I hate standing in line at the rental store and hate all the people that generally inhabit it (old people).
You probably don't wanna hear this but that usually starts happening a month or so before your disc drive craps out. If that's been happening more frequently recently you might want to trade your old one in before it's worthless and pick up a new system. I saw an ad for a 160gb with a copy of Killzone 3 for $299. My 1st gen PS3 lasted about 3 and a half years before finally breaking and that is how it happened.
They probably don't plan on correcting it....I'm sure they like it the way it is. See you stay signed up longer in order to finally get the games you wanted all along. In a way they're trying to give you just enough to stay signed up but not too much that you'll quit after two months.
I would recommend pairing down your list to just your favorites and the games you want to play. Don't just throw random games on your queue you may be interested in just to have a full queue. I noticed that as soon as I whittled my list down to like 10 or so they started sending the games I wanted with more frequency.