In reply to Removed UserHOLTY: A few people saying the master cams will get stuck. I'd be interested to hear how often this has happened to them as I've never had a problem with cleaning them.
If you don't normally extend your cams then the lack of a longer sling might be an issue, if you usually extend your cams anyway then it's irrelevant.
Walking has been flagged up as an issue by people both because of the sling length and because of the narrow head width. This is probably more noticable in the larger sizes. The triggers seem to be quite stiff though which can help keep them in place.
Search the articles on here for master cams, their was a useful review a while back.
ben