I have long been a fan of this engine ever since seeing some guy on Youtube calling it (the "diet" version) "perhaps the finest chess engine ever made" (yeah that's certainly an exaggeration) and testing it myself.
It plays in a really nice and human-like manner with nice positional feel and still a skillful ability to attack when the time is ripe.
It's probably only about the level of a strong IM or weak GM, but it's a fantastic training partner for strongish humans or even other engines (sub-2900).
The other day I installed it in the Fritz GUI (via wb2uci) and it worked great in a tournament I am running.
Here are some results from the first 5 rounds.
Francesca Diet 0.19
1. vs Deep Frenzee 3.0 - WIN
2. vs Strelka 1.8 - DRAW
3. vs Thinker 5.1c Passive - DRAW
4. vs Deep Fritz 11 - DRAW
5. vs Chess Tiger 14.0 - DRAW
So it not only plays in a nice "realistic" way (that looks like I'm watching a high-rated game on ICC), but it holds down some 2600-2800 engines in the process.
I don't know why nobody talks about it.

