Hmmm...have heard about white & pink doves being good lately (nothing about purple ones tho), but haven't heard a single good thing about the monkeys (piperazines). I'm going to change your thread title to include the pill names so hopefully someone else can give you some help.
i've tried the purple doves at lovefest, and honestly they made me really sleepy. no crash or anything, but it made me really tired and i couldn't dance, and pretty much sat down until the pill wore off. it still made me feel really relaxed and i did feel really good, but took away all of my energy.