Just type the command and then any regex you'd like to search. By default it searches filenames and excludes class and other data files. It looks recursively down from your current directory. Then it presents a list of results and lets you type a number to select one for opening in vim.

After quitting vim you come back to your results and can continue opening files or execute a new search. To exit type 'x' or ctrl-c.

If you'd like to search through file contents, use the '-c' flag.

Enjoy