I purchased the F2C Search component / module yesterday. Setup was pretty easy without having to consult the documentation to much which is great. Just using with a single content-type.
The only issue I currently have is that the Integer Slider field does not show a slider, it just outputs the start and end limits in text.
The proposal was to use this to select a range based on Year. The Year field is not a date field, its a standard single line text field that contains the year. IE. 1968, 1971, 2018 etc.
In case the slider expects some other form of HTML5 input I have also tried this a number field and a range field to no avail.
F2C Pro 6.17.0
F2C Search 6.7.0
Questions and answers for Form2Content, a Joomla CCK.