I've been doing them on a regular basis the last several years.  They're a real shoulder saver.  I'll superset pushups w/crossovers, then superset pushups w/a pressing movement.  My shoulders haven't felt this good since my 20's and i have commendable chest development.  If you're in this for longevity, reduce the heaving pressing and add some crossover/fly work.  You're elbows and shoulders will thank you.