This. And if your foot slips off the pedals, you can easily lose your balance. I like clipless better than toe clips (take no straps), which I had before I bought a bike that came with clipless pedals. I only tipped over once, and that was because the new bike was also my first bike with STI shifters and that and the clipless pedals conspired against me one day.

The dual sided clipless/flat pedals might work well for if you ride your bike on city streets and stop a lot or do errands. Out on county roads, the clipless side would be more useful.

And from what I've read about using clipless pedals, it's not about pulling up when you ride, it's pedaling at the bottom of the stroke, as if you were scraping mud off the bottom of your shoes.

YMMV