Well, maybe it's time I try Manzanillo again ... but remember boys, I'm looking at this from a new-commers perspective.
There are so many people who come down here, have one bad experience within their first few days and decide never to come back, much less actually explore and learn about the country and experience or try to understand it's culture.
From experience, it's best to place yourself in a comfortable situation and expolre from that point on at your own pace, if at that point you decide to go all in, then go for it! At least then you'll have some idea of what you're getting into.
Stay well,
Amy