LOVE this extension, it's very handy. :) I spend a lot of time sitting at my computer and lose track of time easily. I use this extension to set timers for my laundry, timers so I don't forget my tea in the kitchen until it's cold, timers for food I put in the oven... very useful. For timers you only can have four 'slots', but you can easily click on any slot and adjust the time, so you can tweak them to suit whatever you need it for. I just now added an alarm to remember to do some stretches at a specific time, which prompted me to think about how handy this thing is and finally get around to leaving a review lol :)