i apologize for my negligence. i never gave it a thought that he/she may not know much about clipless systems. i am admittedly bias. i started riding look deltas in my pre teen/teen years (25 years old now).

clipless pros: (in my opinion)
smoother stroke (circles, not pumping)
lower stack height (much better feel)
better bike control out of saddle

clipless cons:
cost
harder to walk (but this is irrelevant. i ride my bike to bike, not to walk)
some say harder to get out of but this is not true (see below)

the same pros can be had with a proper toe clip/strap/traditional cycling shoe but this requires you to reach down and tighten and/or loosen the toe straps every time you want to take your foot out. it is also much harder to find a good non clipless cycling shoe and those that are around run the same as a clipless shoe. i am happy that my parents started me riding with traditional 105 "aero" pedals, cycling shoes, and downtubes. after a year (or so) of road cycling they gave me some of their hand me downs (looks, bar ends, and then brifters)