Strengths: They are very strong, I've done more than 300 miles in them already and theres not much wear on either the soles or the upholstery. I can see them lasting that long again and previous Sauconys have also been very durable.
Weaknesses: They have taken some wearing in and at first they seem to stress the muscle round the shin. All fine now. I don't think they are the most comfortable either, the ride seems a bit high and as a result I certainly wouldn't race in them.
Overall: Good long lasting shoes that can handle the bulk of training for almost a year. Personally though, I'm fairly big (11 1/s stone) for a runner but I prefer something with a little bit more cushioning and a lower ride, I'll be going back to NB 765/6 after.