I had been using Looks for 22 years and switched to Speedplay Zeros 2 years ago. I cannot believe I waited that long. I absolutely love these pedals! First of all, mounting them is a breeze because your for-aft, your left-right, and your rotation are 3 separate settings. You simply mount the base plates where you want them fore-aft, then you mount the cleat bodies where you want them left-right, and then the built in float takes care of the rotation. With Look, all 3 axis are taken up in a system of oversized slots with washers. Adjusting anything one criteria (for-aft, left-right, or rotation) will very likely mess up the other 2. Since switching to Speedplay, no more fiddling with oversized rectangular holes and washers trying to get the Look delta cleat "as close as possible" to where it should be.
The double sided entry is great and I love the rotational float. After 22 years I still felt the need to look down at a stop light with Looks to click in, which takes your eyes off the road. After about 2 weeks of Speedplay, I don't look down at all. Feel it align below the ball of your foot and just push down. On EITHER side of the pedal.
And they make a model called Light Action that is easier to clip in and out of, which you may find preferable at first.