If your team is very small then strictly creating feature branches and pressing the merge button immediately because there's nobody left to review it is silly. I like that it gracefully degenerates into just committing directly to the trunk when it makes sense.

This works with git (or DVCS in general) because your local "master" or whatever is a short lived branch. People seem to forget but with git you are branching every time you clone. Obviously committing broken stuff and WIPs directly to the trunk isn't going to work.