turbo and exhaust wrap

I've been meaning to ask what you guy's think of wrapping the turbo and the 1rst few inches of exhaust pipe?There is a kit avail and it's supposed to help with efficiency of turbo.

The stuff works to keep heat in the system so that the heat energy reaches the turbine wheel. Unfortunately it also causes hot spots and leads to the early demise of the wrapped parts

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88 TC X 2, 86 SVO, Main TC with K&N, 3"DP to 2.5"duals through Dynamax, Ric valve at 17+ and disconnected KS.
Elite Bodega 16" chrome wheels. Autometer pod w/ A/F and Vac/boost gauges. New engine shortly, ported head and
manifolds, polished and cc'd chambers, RR, Crowler, ARP head studs, Walbro 190 pump and T-3 for starters. KB subs
and jack rails