Just want to give a +1 to MFP. Right now, my login streak is at 658 days. What I've learned over these (almost) two years has been life altering. I've figured out I actually don't need to snack on carrots all day, I can have a serving of Ben & Jerry's, or 2, or heck, the whole damn carton depending on exercise and whatever else I ate during the day. I'm a devoted advocate of IIFYM now.
The biggest negative of MFP is the forums, which make Youtube comments look like the Algonquin Round Table.
TSY you mentioned wanting to keep your lean mass while losing. That's tricky and soon you'll need to take a slower rate of loss, else a higher percent of muscle gets lost. I don't know where you started off, but with a good amount to lose, then most of what you shed will be fat, but at around the 25-30% body fat point, then the 2 pound/week becomes more important and the desired rate further decreases the leaner you get. That makes that last 10-15 pounds seem to take forever.
