Beware of log chains!
Nylon straps tend to put a lot less stress on the drivetrain especially when you are unsticking a much heavier vehicle.
When a chain reaches its full length it doesn't give very much which tends to relay the shock to the recovery vehicle and drivetrain.
Straps on the other hand, are much more elastic and actually use the energy that would have resullted in the shock, to a much more usable form that actually helps recover the stuck vehicle. Just make sure it is attached to something that won't give way before the strap breaks.
One recommendation is not to use straps with metal hooks attached. I saw a pic in Pickup, Van, and 4WD magazine years ago in which a fella was unsticking a Jeep with a JeepCJ7 and hooked strap. The strap came loose from the stuck vehicle and proceeded to launch itself through the back glass window, rear seat, drivers, seat, and finally through the windshield where the hook lay on the hood. BTW, the driver lost the lower lobe of his right ear as the hook proceeded through the seat. Just another half inch to the left and the hook would have taken his head off.
Safety first, last and always!