Rich23, not having same experience each time you practice or with each exercise is normal. So they tell me, and I tell myself. I certainly know that every session I do is unique. Some sessions (exercises) are more rewarding in what gallen call side effects than others.
This can be a little disheartening, I just affirm to myself: that I am still getting the benefit; that I am just experiencing a the progression of my ability with SFQ.
I have walked away form SFQ sessions, in the past. I'll attribute it to time constraints and caffiene. All of the experiences good and bad and helping my growth. The nice side effects encourage and enhearten me. The bad experiences challenge me to change my life for the better.
I think it is important to several elements to your life progress. SFQ is just one element in mine. Physical activity is another important one in mine. As well as eating and sleeping properly. I've found that when I've experienced a slump emotionally, physically, and energetically, I only need one of those elements to experience a turn-around and the others follow. 
Something as simple as an extra-long guilt free sleep can work wonders, or a relaxed hour long walk, or a jog, or to really enjoy my family free of other stresses.
You are perfection.
Iam2 
