I've used my Koala Clip for a couple of weeks and it works very well. I've jogged with it and kayaked with it and it is very comfortable. Some reviews mentioned the clip works best with racer back sports bras and I find that to be true. It can work with lower straps, but it is harder to access your phone because it sits lower between your shoulder blades. I also discovered that my Google Fit doesn't record my runs correctly now, but that is not the clip's fault. I just need to figure out how to make Google work right!