Double Stroller InStep Screen Saver. If you have twins you know that everything is more expensive for two. Not to mention more cumbersome, heavier, bulkier and generally more inconvenient. That is why it is so important to put in the time to research before buying a double stroller for your twins. The stroller you chose will either make life easier on you or all around more frustrating. There are many variables that you must consider when shopping for your stroller and there is a stroller to meet every persons needs.