Very effective at its job. I've got a long 16ft sea kayak on kayak J-bars. Lasso's go easily on both ends with a decent amount of slack in the middle still. I just wrap it around the bars 2-3 times it is a tight fit at the combination lock connector in the middle. Easy to set the combination at start and works like a charm. I've only used this on one trip so far. The lock works as expected, but in the grand scheme I really wish I didn't have one more thing to take off and put on the kayak. Putting it on the roof, and securing it with 2 tie downs already takes a good amount of time. The lasso is an extra step I don't see myself using often. For this trip I was particularly worried, because I needed to park the carkayak in a busy lot for several hours. If I'm just stopping briefly I wouldn't care so much.

They appear to be what I need but I haven't had the opportunity to use them yet

Well made and they do the job. I ordered one for each of my kayaks. Would have liked to have a shorter length for when I'm locking the boats to my roof top carrier, which is where I utilize this lock the most.

Sturdy and as advertised. Only drawback is that it doesn't quite fit around the very wide sit on top kayak we purchased (12' Lifetime from Costco). I still use it for storage and transport, but in a different configuration than shown due to the fit.