Wildwood 

I'm running over a dozen of the original Look Deltas, tho a couple are knock-offs.
Prefer the red cleats with float.
The black ones are what (I think) used to be called Track cleats.
I would rate their reliability and pedal durability to be exceptional.
Use rubber cleat covers to extend the life of the plastic cleat.
Easy to buy inexpensively as used.

An important consideration for me when making the decision as to Which Type?, was the size of the contact area between the shoe and cleat to a solid pedal platform. From my experiences the 3-bolt felt more effective in distributing the pedaling forces across the bottom of my foot. Clearly, the sole of the shoe thru stiffness+fit is the primary factor, but pedal/cleat size put me on Look back in the 80s.

Others will have different experiences, especially the mountain bikers.