||I was motivated to try BOA laces instead of the traditional ones seeing how struggling with the traditional lacing can easily take the kids half of their skating session. And indeed it seems to work well (only had 2 sessions so far). Also, the adjustment range (EUR:35-40) is pretty good, should last until almost adult size. I ordered them sharpened (+5GBP) so they have a good grip.
If you are used to K2's roller skates, you'll notice that the top ratchet buckle is missing (its place is taken by the BOA knob). So it feels a bit softer on the top. But apparently the velcro gives you enough blade control, and softer lacing on top is actually preferred by ice skaters for cushioning.