1)chronograph: cannot retreive lap times w/o heart monitor in use.
2)interval timer: yes, but only beeps when intervals completed. Can't hear beeps to begin with-so of no value. 3)Chronograph continues with interval timer ON (this is NOT a countdown timer). 4)Hiking: altitude reading is inconsistent. Standardized it at sea level with local pressure. Stayed at 0 feet while at water's edge but when inland a mile registered 57"(while still at sea level). I read as much as I could find on this watch before I bought it but it wasn't avaialble locally to evaluate before purchase. Terribly dissatisfied for my intended use. Now stuck with watch.