I can tell you that they are not as sensitive to heat as the Sanyo or the GP... from what some of the local hot shoes have reported they can handle up to 70 deg Cels!!!!
when coming off the charger!!
...... but performance wise I can feel quite a bit of punch from the 3 packs that I have and they are Zapped and mached
1 Pack By G-Style and 2 packs by ALEX Racing...and they are performing at the same Level as some of the SMC & ProMatch packs that I run
...so far about 10 charges per pack ..and I have not noticed any drop in performance as of yet