The first few times I used this bra, I was in despair because it leaked everywhere.  I found, though, that it works much better if you sit upright, fasten it as tightly as possible, and use the straps.  I was unable to fasten it tightly enough while wearing it, but you could ask someone to help you or put it on, then use the zipper to take it off and adjust the velcro as needed.  Using the straps is a bit of a pain and I was annoyed at first, since it takes a little more effort to put on and take off, and pretty much requires you to strip rather than pulling your shirt up or down.  However, the convenience of actually being hands-free makes up for that, in my opinion.  I do recommend that you still check periodically to see if you're leaking, especially if you're at work and don't have a change of clothes handy.

I love the zipper, it's a genius idea and you don't have to worry about adjusting the band size except when you have significant changes (like when your milk comes in or your supply regulates).  I did find that without the insert the slots are WAY too close together, but the insert is pretty large, so it would have been nice if that portion was more adjustable because getting the bottles lined up perfectly is the best way to avoid leaks, and I had to use the insert and sort of squish everything together because without the insert, the bottles are too close, but with it, they are too far apart.  I'm sure I am not the only woman who doesn't line up perfectly with one of the two options!