Always nice having a couple of these around if you're really into tech or spend a lot of time at the computer. Very easy to use; remove the tab on top, point and squeeze (the trigger). These feel rather expensive, but I don't use compressed air often enough to say for sure.
(Purchased 4-pack Sept 2020; still have two cans untouched. I'm sure anyone really into computers would tell me to dust my rig more often)