My take on the turbo shields.... I got both the Peg Turbo Shields ID and also the Peg Turbo 2 Shields Low ID (which is essentially a Peg 36 shield upper with a Peg Turbo midsole).
I found the Turbo Shields mid/high to be similar to the original turbo 2's in terms of cushion and midsole, but the upper felt lose, less stable and less supportive than the original turbo 2's. Its made of a waterproof layer on the outside and a soft mesh layer on the inside which is comfortable yes, but I just didn't find them as supportive as I'd like.
The Turbo 2 Shield Lows on the other hand felt quite the opposite, the more snug/tight upper of the Peg 36 shields hug your foot much more and its a thicker material so also feels more supportive. I decided to keep the lows for my winter running and returned the mids as it was just a little too unstable (and also heavier!).