Honestly, from what I've gathered both on here and at my undergrad, whether or not the class is beneficial depends very highly on who the teacher is. I know of a couple people who took it this past Summer and absolutely despised the med student Kaplan contracted to teach it. He was, in their own words, more or less of the opinion that, "If you're here then obviously you're not smart enough for medical school."
Certainly, if you have a teacher who truly engages you and makes it a worthwhile experience you may find it beneficial. On the other hand, you won't know that until you've dropped the cash, and then you may find out the opposite is true.
I personally don't know a single person at my undergrad who took the class and was pleased with the decision. Most of them try to justify the fact that they paid for it by saying they, "really found the materials helpful." I don't know about you but I don't believe there are any MCAT materials worth $1,900.
Head over to the MCAT forum, pull up SN2ed's plan, and plug it into a calendar of some sort. Make yourself stick to it. There's no reason it should cost you $1900 to review for the MCAT.
I'll steal someone else's analogy that I saw on here: [MCAT studying] is kind of like setting a goal to eat 5 pancakes a day for a week. You might do pretty good for a few days but on Wednesday you decide you don't want to have pancakes. So, you don't eat pancakes that day. However, now, on Thursday, you have to eat 10 pancakes to make up for it. I think you catch my drift.
Hang in there! Good luck!