This is a great product. The entire body of work is incredibly well done, and we're kicking off our first full campaign tomorrow in fact. Heart of the Wild is an indispensable part of the material, and you'll want to have it for your campaign.
In preparation, I've re-read The Hobbit (twice), and am re-reading LOTR now, and its great when you can point to various points in the plot and relate them to specific game mechanics, and everything makes sense.
I got hooked on LOTR in 1976, and have been a huge fan ever since. I've always tried every LOTR game that's been published, and while each one has had it's strong points, and each one was a genuine attempt to allow role-playing in Middle Earth, this one really hits it.
There are some fantastic fan-generated material out there, as well as some free supplemental aids from the publisher that will help as well, including charts, indices, etc.
Heart of the Wild is what brought me to RPGNow, because I purchased all the hardcopy editions, but Heart of the Wild was not in stock, and I was not able to find it anywhere. I don't know why I didn't think of this site first, but in any case, I've purchased all the hardcopy editions I could, plus the softcopies, so I can have both the books (which have their advantages) plus the ability to keep the files on my laptop as well while we're playing.
[5 of 5 Stars!]