Not a fan of it, I like steadier blast so I usually just increase my doses as the cycle moves forward. Same thing with tapering down doses towards the end, drugs will taper them selves off, so it doesn't make any sense.
Only exception on front loading that I might consider trying are long esters like Equise, Nebido, and maybe Deca-Durabolin and Sustanon. With Sustanon it seems to be a popular way to run it, but I suspect it would be still quite an rollercoaster, even with with the long esters in Sustanon.
I'm on 1 g of Nebido (Test -Undec.) every 7 weeks atm. For my TRT, and it's been pretty smooth ride so far (about 6 months), excluding the first shot that shot my Test levels quite drastically upwards. So with that in mind I will probably keep away from front loading practices.