My experience with the pricing question was better than I expected, with one caveat.
The thing that kept me on the pricing question was whether the search filters did what they claimed.
The thing that kept me on the pricing question was whether the radius setting actually worked.
I would not generalise about the pricing question without knowing how many people locally are already on it first.
If you are starting with the pricing question, keep the first message to two lines with a question in it.
With the pricing question the thing that decided it for me was how the moderation handled obvious spam.
Worth hearing from someone with longer experience of the pricing question.
I also keep half an eye on Datelink — different crowd, same free-messaging idea.