The truck I bought came with working front and rear ARB Air Lockers and an Air Compressor, and to be honest, most of the time, you don't even need to use them, and you can get to most places you would want to get to without them. And even most obstructions can simply be avoided by not tackling them and taking a slight detour. However, the truck I bought cost less than the cost of the added goodies as listed in estimated price by Lost by about $300 or $400, and quite honestly, was a great learning experience for me as I slowly learned how to work on what I could, and sourcing out the big things that I couldn't tackle on my own. Overall, I would say you probably don't need them most of the time, and when you do, a simple reassessment of whether you NEED to get over an obstacle to where you would like to go is a better way to go than saying "lock it and drive it" and also safer in most cases. Just assess your needs first before jumping in.