I know how you feel. I have been using clipless pedals for about 2 months now. I still have problems getting the cleats to clip-in while I'm riding. I now have two bikes, both with clipless pedals. My hybird has Shimano PD-M324s, which were an aftermarket upgrade for the bike. These pedals have the clip on one side, and a platform on the other. They are great for clipless newbies. My new MTB has Shimano PD-505s which are pure, double sided clipless pedals. There is a plastic platform that is clipped into one side of each pedal that allows me to use them as regular pedals if necessary, although the platforms are small.
Overall, I like clipless pedals. They allow for greater, more efficient transfer of power to the wheels, and make you feel more "attached" to the bike. However, they can be unsafe if you do a lot of sudden stop-and-goes. I've already accumulated a number of abrasions on my knees and elbows from falling over not being able to unclip in time. Most of that is due to my recklessness, though. I would say that clipless pedals are safe under most circumstances if you're carefull.
I guess getting to the point where you can clip into the pedals quickly takes time and practice.
-Matt C.-