I switched from a prong to a drop away. I could never get tuned with the Prong. Foot powder indicated no fletching contact, so I don't know what was up. Spring tension, maybe. Anyway, I dealt with 3 different prong rests over about 2 1/2 years with no luck.
Other reasons drove me reluctantly to a drop away. In theory, I like simple, non-moving parts, especially for hunting. The drop away is more prone to malfunction that other rests, IMO.
But, it took me about 20 minutes to get my setup initially tuned witht he drop away, and my BH were hitting with field points out to 45. :darkbeer:
I'd prefer something simpler, but I'll probably never go back to a prong type based on my experience. It just left a bad taste in my mouth.