I guess a downside is that it does take up a lot of real estate on the bike, and there are a gazillion wires about (but they give extra bungies to tie down errant cables and keep things (relatively) neat. But, it makes me glad I got that bike locker! It'd be a PIA to take on and off every day (twice, even!). Web sites say it comes with a "cloth carrying bag" but this did not. DH called the site where he got it, and they said they've gotten a bunch of calls about that. They think Knog may NOT be selling it with the bag now or here (U.S.). They said they'd investigate and get back to him. Bummer if it doesn't come with it. It would be nice to have one place to put everything when i do take it off the bike.