I'm trying to see what the big selling point is. The interface definitely looks "newer" and cleaner than FlightMemory, and the sync with FlightRadar24 is cool, but is it worth the time to re-load all of the flight data from previous years?
I use both F-mem & F-Diary. They're useful for different things. F-diary is hopeless for specific aircraft variants. I want that I flew a 737-522 rather than just a 737-500, however it is good for faster searching of the library.
Flown to 120 Airports in 44 Countries on 73 Operators. Visited 55 Countries and counting. Wanderlust is like Syphilis, once you have the itch it's too late for treatment.
I have accounts in both, but certainly have more data loaded in Flight Memory. To be honest, the statistics functions on Flight Memory are far better in my view. I just wish the maps were more like Flight Diary, it's only real failing.
I tried FlightDairy for its zoomable map and visually appealing charts, but the site is missing a lot of functionality compared to FlightMemory. FlightDiary is missing many of the smaller airports I've flown in and out of and only allows the input of aircraft operators in its rather limited database.