How does the lacing system on this shoe compare with the Boa system I am presently using?

Ralph, , to make a long story short, the main difference between Boa and Quicklace is the first is mechanical when the second is manual. You can always take with you a replacement lace, but if the Boa dies you're stuck in the middle of nowhere w/o solution

Interesting, Steve. I have a pair of old XA Pros (the originals) that I wore training and racing for several years. The only problem I had with the laces I trace back to the time I neglected to tuck the loop into the little pocket on the tongue--it turns out that a big kevlar loop is not a good place to stick the toe of your other foot while you're running. That lace eventually broke--but not right away, even then. You might be faster than me though, heh. It wouldn't take much.

I heard that the BOA system is not good for trail running. is it right?

Ralph,The BOA system uses a dial and a steel cable to tighten your shoes. They are similar in the sense that you can not tweak your lacing and you are able to lace your shoes very quickly, which is a huge benefit for trail shoes. This type of lacing isn't able to get the laces as tight as the BOA system. Also, the kevlar laces aren't as strong as the steel cables, used with BOA. Still they are stronger and more durable then conventional laces. In the event you are able to mangle them, Salmon does sell replacement lace kits. I have used this style laces on the Salmon Pro 3D and the XAComp2 and have been very happy with them. Mahalo, SumoHey Ralph,I don't know if it's the material or design of how the laces are run up the shoe but I had horrific problems with them. The most miles I got on 1 pair of shoes was 60-70 miles but usually 1/2 that. At that point the laces were completely destroyed which is okay in that Salomon replaces them no problem. I just got tired of them wearing out and if you're doing longer runs there's always that chance they'll break mid-run and then you're totally hosed. Incredibly comfortable shoes but design flaws in the lacing system....in my opinion. Hope that helps!