Guggulesterones seem only to work well in those with compromised thyroid output (from excessive dieting/being well below your setpoint/Leptin's nadir).
So the average person is not likely to see much with it. Also is it useful for acne and other skin conditions.
As for the breasts, this depends on your bodyfat%. Get far too lean, away goes the breasts (to some extent, at least). A topical Adenosine blocker would be interesting to counter this.
Yohimbine blocks A2 receptors, a high density of which being found in "problem" areas such as hips/butt. That is, you may lose some "junk-in-the-trunk" with its use. For most women, at least, Yohimbine is a good thing (and for those men screwed over by God with Estrogenic adipose distribution).
So if you like to travel heavy, with a full suitcase, you may wish to avoid Yohimbine. Ephedrine/Caffeine is okay, though. NE acts as its own negative feedback mechanism, so fat lost in the butt wouldn't be to such a great extent as could it be from Yohimbine usage.