I don't care for the plates because they are larger than stock and look bulky and weird to me under the car. But more important is they weigh more and that is more weight your shocks have to control.

I use 4 axle straps on every car I haul, even in front around the K member on old mopars and around the engine mount for our durango and 300.

And lets not even talk about whether they should be crossed or not!