Timo Boll Spirit is better than Timo Boll ZLF in my opinion for Butterfly Tenergy.
There are so many Timo Boll blades out by Butterfly because of his success. The ZLF is one on newest from 2009. Zylon Fibre has been used in many blades recently and is very expensive. This blade for me is the best thickness, sits best in my hand and looks the best. If you are a looper and stay at the table this blade has to be on of the best you can buy. But it doesn't have the right hardness for me for such dwelly Butterfly Tenergy rubbers.
11th May 2010 - After 2 years of using Tenergy 05 on both sides on a Butterfly Ishlion fast blade, I have finally happily moved on. I have had a timo boll zlf for almost a year and have tried numerous rubber on it. I have finally after about a year or more of not using tenergy 64 finally changed to my new "heart" blade. I have found the perfect looping rally comination for my table tennis game. The best set up and the most enjoyable I must add is:
Butterfly Timo Boll Spirit Arylate Carbon blade with Butterfly Tenergy 05 on forehand and Tenergy 64 on backhand.
I can rally all day with this not too fast nor too slow, not too soft not too hard, it is perfect.
if you have any questions about this please ask.