I frequently see guys that do the blast/cruise thing. I was curious as to the point of doing it this was, but first i wanted to make sure I understrood it right

So lets say you do a 16 week cycle (example)
test e 700
deca 300

So after your last pin on that cycle the next week you begin your "cruise" at test 250/week. You will continue test250 until you go into your next cycle and forego the entire PCT process. Correct??

So my question is what is the purpose of cruising at teh TRT dose at 250 and not doing the PCT process. I would assume you will hold onto your gains pretty well that way.

Is there a benefit to doing it this way over another?