The ease with which I can customize my car keyless entry system for my particular vehicle makes it easy to use. You can also set up your remote so that you can control more than one door at a time (such as when you want to lock/unlock all four doors). Sometimes even though multiple keys are programmed in the unit, sometimes only 1 or 2 work. This is a very convenient product if you need to have different functions per room such as garage code versus apartment living codes. I like that it's a very simple tool. It helps me keep all my tools organized in one place. The only thing I don't like is how long it takes for the tool to get to you once you've placed an order. Sometimes it can take up to 5-6 weeks before it gets here. However, this is minor compared to the overall service and product itself. Try it out! It was great for organizing all my tools and equipment. It also lets me know when they're coming so I can plan accordingly.