i always used to buy casio - it was exciting waiting to see if the battery would run out before the cheap plastic strap broke. my present one is a Lidl's 6.99 special. you get a stopwatch, count down for any time, it can be set for so many beeps per second (useful for getting stride patterns in reps) and also has a compass setting which i can't work as i lost the booklet. really nice strap, big display for hours and mins. only problem is i can't read the seconds whilst running which makes it interesting as i only know my mile times to the last minute.