They're all easy once you get used to them. I had a bike with spd's and crank bros. candy-c pedals for years and like them both. The crank bros. have no adjustment screw, but have different release angles based upon how your install the pedals.

I wouldn't worry much about it, you'll get used to anything after a while.

That said, I use flat BMX pedals on a 30 mile round trip every morning and love them. I said to hell with clipless over a year ago.

Now! You're going to get at least 12 opinions below since everyone loves their fancy shoes and is dying to tell you about their pedals! They'll all probably say "I use X brand pedal and they're easy"