I have a Detroit Locker in the rear and an ARB air locker in the front. I have another car to drive but I drive my pickup to work about half the time. If you pickup is empty, the locker will chirp the tires almost everytime you take off while turning. Put some weight in the back and it's not a problem. I towed my travel trailer with it, and it worked really well with that amount of weight.
At the drag strip it works very well. I prefer it to the ARB. However I would not want a Detroit Locker in the front. With the ARB you have to make sure it has engaged (locked), before you hammer down on it. With the Detroit Locker, just power down anytime you like.
Neither is perfect, and both work...
Paul