I have both a clipless set up on my older bike, and cages/straps on my current bike. Since I commute to school, I prefer using the cages/straps combo since its easier to dismount and walk to class in since its just plain old shoes. With clipless though, I feel very connected to the bike and I do feel a slight gain in my cycling power mainly because you're basically locked onto your cranks. Walking with them on, like stated is a pain when you have the cleats in, I feel like I'm constantly about to fall backwards and the shoes themselves are set up so that your toes are bent back a bit, almost like you're standing on your tip toes which make it somewhat awkward to walk in. If you do go clipless, I'd recommend bringing a separate pair of shoes to swap into. If you're looking for shoes, check performance bikes if you have one near you, sometimes you can score a really good deal on a set of shoes (I got mine for about 50$). Also if you want hybrid shoes, you can look at either Chrome Industries or Mission Workshop, I believe they offer shoes that look and walk somewhat like normal and still have the area to attach cleats to.