Irrespective of the "Brand" of the LiPo you should always fully charge it and then use it only till 3.5v per cell (or only till 3.8v to be on a safer side)
If one intend to use LiPo Packs safely and don't want it to get damaged then he/she must have full understating of how it works.
This video should help:
And always use a LiPo Alarm while flying. Here's why:
http://www.rcgroups.com/forums/showthread.php?t=2381375