Strengths: Usual Asics quality. Decent price. Wonderfully soft and stable. Gait analysis shows only slightly less supportive than the GT2140 but i'm not a heavy guy.
Weaknesses: Standard width is a little loose.
Overall: The GT2140 fit better but the cumulus is softer. Use the cumulus for recovery runs at present after hard training or during injury. The ride is just so soft and gentle. If the fitting was tighter the GT2140 wouldn't get a look in!
Weaknesses: Heel cup shallow. Transition from heel cup plastic to collar too low and irritates. Heel collar too hard and high, catches below ankle bone. Memory foam on heel felt more like a lump than something that molds to your skin. Top eyeley position sitting laces onto ankle/foot top tendon. Couldn't tighten shoe to get heel correct without pain. A bit heavy. Caused shin pain.
Overall: Redesign the heel cup and it's a possible winner
Weaknesses: Baggy toe box. Loose heel cup feel. Heel cup feels too shallow.
[Update 17/05/09] inconsistant fitting?
Overall: Standard width wide fitting. needs to be snugger.
[Update 17/05/09] Tired the AW09 in a 9.5UK and they felt baggy in the toe box and loose on the heel. The SS09 in a 10uk for some reason was snugger around the mid foot and toe box. Perfect heel cup. Both boxes didn't state they were other than standard fitting. Strange.