I ordered shoes and pedals (Time ATAC XS) last week and they finally came in today. I've never ridden clipless pedals of any kind before, just clips and double straps.

Clipless pedals are so choice. If you have the means, I highly recommend picking some up. It's like the last bit of slop in the drivetrain has been eliminated. I feel more connected and in control. Smoother. Something I can do now that I couldn't do with clips/straps is unclip while moving and easily clip back in. The couple of times I tried that with clips, they spun around madly, crashing and scraping on the pavement and it was dang near impossible to get my feet back in. I thought it might take a while to get the hang of clipless, but it's really easy to clip in and out. I put them on in the parking lot behind the store, circled around a few times clipping in and out, then rode them home. The ATACs have a bit of float, which is nice for the knees. I did plenty of skidding and never felt like I was gonna pop out. Of course, the cleats are brand new - I don't know how they'll be in a few months.