Hi Pat,
I've been using the Smartshell for couple of months. 20 days in a raw in Mauritius with the wave spreader bar set up.
Harness super light, it fits well after 2/3 session as it needs to shape to your body.
It is well refined and did not show any sign of wearing after this high intensity period.
Overall only one negative aspect is that does not come with any lock-in system for spreader but you have to use the adjusting belts to close it.
Overall 8/10 my judgment basically due to this non practical closing system.

gazman2 said..
Gday Pat,
Have been using the mystic 2 face harness. Not a bad idea to change your harness as I have just discovered that mystic don't have replacement belts(the belt that the slider bar slides along). Just broke my strap contacted my local kite shop, they contacted mystic and they don't supply replacement straps in oz. F#$ing great.

Put a dynabar on it, much better movement and almost zero wear on the rope if you use a pulley.