Saw the new InCase Hardshell at the Apple Store. I liked it so much better than the Speck... I bought it. The Speck weighs 14.2 ounces - the InCase, 12.4 ounces. The Speck Satin is rubbery on the outside but still is hard brittlely plastic on the inside - the InCase is softer on the inside to match the outside. The Speck has a 2.25" square of narrow vent slots on the bottom on one side - the InCase has vent holes all across the bottom.
All in all, the InCase is more malleable, less brittle feeling, lighter weight and better vented. Unlike the previous generations this case does not restrict the display tilting all the way back. I think it's just a better case.
One other note, when I removed my red Speck case from my MacBook, I had several red scuff marks. They came off, but I didn't like that at all. I only had it a few weeks, so I wonder after a year or so if the hard brittlely case would eventually scratch up my MB. Who knows.
Nice. Looks quite promising. Did you purchase it from a UK Apple store or elsewhere?