This really does make practising Kanji while reading English a reality. The only thing that annoys me is the fact it wasn't around when I just started leaning Kanji. I've given it five stars because it really does deserve them, that is not to say a few minor tweaks and improvements couldn't be made. For example, I would love to have an option to switch between 'first letter replaced' and 'whole word replaced', A toggle all open tabs on/off (if this had an exceptions option too that would be amazing), a built in editor for the definitions file would be very handy, for people half way through their Heisig (or whatever) a place to enter where you are up to would be good to show only previously learnt kanji, and the most important thing needing done is a Thunderbird version. But don't let that (very small) list of things I would like added put you off. It is very usable as it stands. Top stuff.