Here's a close-up photo that gives you a better view of the completed row of stitches. If you look really closely, you might be able to catch a glimpse of the yarn tails under there, but they are hidden pretty well.
If I had used colors that really contrast - for example, black and white, or red and white - the ends might be more visible than they are in this sample. Keep that in mind when you decide whether or not to use this technique in your own crochet work.
One More Tip: As your completed projects age, I recommend that you periodically take a look at them to make sure the ends aren't coming loose. If the ends are going to work their way out of place, a likely time for that to occur is during washing. So, the ideal time to spot-check is after laundering. It's pretty easy to take a good look at your items as you are folding them up and getting them ready to put away.
If you do find an end peeking out, weave it back into the project as you normally would, using a tapestry needle or crochet hook. Even ends that were securely woven-in can pop out from time to time, especially if the project is worn / used / washed frequently.
