PJenkins84 is right about this and I would go a step further on used dating app.
Anything I recommend around it has to clear one bar, which is whether the filters survive a refresh.
I kept notes for a month on the site because I kept losing track of how aggressively it pushes credits at you.
Unless you are in a major metro, expect whether the sorting can be trusted to be the limiting factor on the service.
Different crowd on Flurrydate, which came up earlier, which suited me better.