The set-up on the LGW to MCO route is different from other routes, which makes it better IMHO. Premium Economy on the Orlando route occupies the whole of the upstairs cabin (32 seats or thereabouts) with Upper Class downstairs. I have often likened it to being in your own private function room.
Upper Class is downstairs on this route. We have been upgraded to 'proper' Upper Class, i.e. the space right at the front ahead of the doors, <i>and</i> to the 'B' cabin - Upper Class seats, but to the rear of the doors. The two were not comparable and I would be outraged if I paid UC prices and found myself in the 'B' cabin. After boarding the plane first, we then had to endure the rest of the passengers trampling all over us (literally) to get to their seats - not their fault, just a design fault. In the 'proper' Upper Class section, the cabin is laid out as it is in PE, i.e. two seats either side of a wide aisle. In the 'B' cabin, the space is identical to Economy, but with a 2-2-2 confirguration and therefore two narrow aisles. The only bonus was that the upgrade to the 'B' cabin happened on the homeward flight, when all you really want is a nice big comfortable seat. Well, and a large drink

. If we were upgraded to the 'B' cabin again we would have to think long and hard before accepting.
On the Orlando route, the PE cabin is divided by an exit with 12 seats in front and 20 behind. We have always managed to get the exit seats and the cabin crew seats fold out in front of those. Sorry to disappoint you Rob and nwr, but far too much space for any knee rubbing!
Here is a link to some photos I posted after our last trip.
http://disboards.com/showthread.php?s=&threadid=316958