This is the third device I have used to jump start my minivan and does not disappoint. The clamps open wide enough, without too much effort might I add, to easily place on the terminals. Some take effort and don't open wide to place over some of the more bulky terminals I have seen. The display is huge and the "Ready" state is hard to misunderstand. Having the charge status is great as one of the devices I used only had bar lights on the side and only displayed after we tried to jump the car - only to fail as it didn't have enough charge.
Am I happy with it? Yes - it worked and is simple enough for everyone in my fam to use.