Strengths: They last forever, and can generally be picked up at a reasonable price.
Weaknesses: Heavy, change in design from 2004 model results in blisters in the arch (know I'm not alone here). I can no longer wear what was once my favourite training shoe. Make me sound like pingu - much louder footstrike than any other shoe I've worn which stops me sneaking up on people ;)
Overall: 2004 model was great, but the changes which have gone into later models has been a big let down for me.
Strengths: A very quick shoe, great feel of the road / track and they let your feet work without restriction, and are the next best thing to spikes on a track.
[Update 25/03/06] A very quick shoe with great feel of the road / track, they let your feet work with minimal restriction. Old pairs make very useful shoes for speedwork on the track.
They're sold as 5 / 10km shoes, but I've worn them for 2 x 10M races and a half marathon. Not sure I'd wear them for longer, but considering them for marathon.
Low profile heel good for midfoot / forefoot runners.
Weaknesses: Little cushioning, and I'm not sure whether I'd ever use them for anything over 10km. Despite averaging 80+ miles of running per week, one 5km race in Mayflys was almost enough for my feet to blister.
Is there such a thing as too much feel? For example, if you get a stone caught in the tread, you'll know about it - that could be very annoying in a longer race!
[Update 25/03/06] Little cushioning - not good for heavier or runners who are not light on their feet.
Annoying tendancy to pick up a stone in the tread which you'll feel throughout a race!
Overall: A great PB shoe which can be found for as little as £20 if you shop around. The material is very thin, and whilst mine have only seen about 40km, I'm not sure whether they'll last much longer before a toe goes through the lining.
The fit is true to size and will correspond to Nike trainers / track spikes.
[Update 25/03/06] A great PB shoe (about 130g) which can be found for as little as £20 if you shop around.