Before I uninstalled CrosuS, I noticed that the server browser was trying to download thousands and thousands of servers. I eventually had to stop it as it was lagging my computer horribly. I'm guessing it was download all HL2 servers and then filtering for FF. There were a couple of other issues that I can't remember off-hand...
Overall the program wasn't too bad but besides ff updates (only 1 released atm), I didn't see a need to keep it installed. Hopefully they'll make the interface easier to use and fix some of the bugs, I'd really like to see it take off. And of course, if it means the devs will release more incremental patches, I'll reinstall right now