My Breitling Chronomat is on a deployant strap with folding clasp. I've owned the watch for 18 months now and the strap still looks brand new as there isn't the stress placed on the leather when putting on/ taking off as with a traditional strap.
Obviously this won't be the same for everyone but I found the Breitling deployant clasp unbelievably uncomfortable with the hinged end leaving a mark on the inside of my wrist!
Breitling's push button clasps on the other hand are fantastically comfortable in my experience!