Strengths: Nice amount of cushioning - no impact soreness on 3hour runs (at 16stone), very nice tread - grippy but not obtrusive, barely wore down over the time I owned them. Also did over 500 miles and not one blister.
Weaknesses: Could be my foot shape, but when I tied them very tightly they 'crushed' my forefoot. Not tying them tightly meant they felt a bit too roomy on and did slip a bit.
Overall: Cushioning was pretty decent if not the plushest shoe I've ever worn. Excellent reliability, through some very nasty conditions. Do what they say on the tin.