I have a bushnell, hand-held laser finder and I love it. I would never play without a rangefinder again.
I like the fact that the laser shoots to the pin, rather than just giving me distances to different points on the green. I know my club distances well enough that I do want to know exact numbers.
As for lasers slowing down the game, I completely disagree. It doesn't take long AT ALL to reach down into an open pouch and shoot the distance. The Bushnells have a feature on them that pick up the object in the foreground (i.e., the pin), so you don't have to be really steady with it. I've usually shot the distance before the group in front of me has pulled the pin and even if I haven't, I can shoot it after they put the flag back in and be ready for my shot even before they cleared the green. And this is a whole lot quicker than looking for a sprinkler head!
The thing that has surprised me about these things is how often they have saved me from about 70 yards and in. It is surprising how many times you are off by more than a few yards when gauging a short shot. This is particularly true when there is undulation on or in front of the green, or when pins are tucked in at the back of deep green. I can't tell you the number times I would take a reading when I first got this thing and think, "There's no way that's 65 yards to that pin," and then hit it short. I have learned to trust it.