The best CEC’s are what are the most convenient, valuable and applicable for you, obviously the association must be an approved provider for your recertification, or of petitionable potential. Most professional personal training assoiciations offer CEC’s, workshops, online tests or via questionnaires via their journal. Are you looking for convenience, expanding your horizons, cost concerns, or building community? Online, and journal write-ins tend to be about the same price across reputable associations. I have also found that CEC for CEC conferences match closely the online or write-in costs. Therefore determining your motivation may help you decide on your format.