It allows me to make micro-investments (purchase pieces of investments rather than a whole stock, share, bonds, etc). As someone new to investing and someone with a low income stream, it allows me to get my foot in the door.
Their security (or lack thereof) is questionable and concerning. They do not have any form of two-factor authorization nor any option to use single sign-on passwords. Given that access to my financials, this is extremely concerning should they ever be hacked (these days it's only a matter of time).