The simplehuman sensor bin comes with brilliantly easy to follow instructions and, although the bin itself is quite heavy, the packaging is not hard to open. We found the sensor worked really well, a little too well perhaps. Despite the claim that it is "precise" and "avoids false triggers" we found it did open when we walked past. However it has odour absorbing pads that fit into the lid, so there are no nasty niffs when it opens. We found the ledge on top of the bin really useful when changing heavy bags. It gives you somewhere to rest the bag so it doesn't matter if you're not feeling very strong. Another bonus is that it has been designed so you can't trap your fingers between the outside case and the inside bin. A well thought out design.